Docker Setup

I have setup the docker container to run the model evaluation.

Initial Query

Write a self-contained Rust program that prints a JSON output of how often each word appears in a text file located in /tmp/file.txt. So if the file contains "This is is is, an example" then the program should print to stdout. {"This": 1, "is": 2, "is,": 1, "an": 1, "example": 1} Don't import any crates that would require a Cargo.toml file. I'll just compile it with `rustc yourfile.rs` and it should work. The program should be run by calling /path/to/rust_word_count with no arguments. Make it run in parallel on 4 cores at the same time, each job taking ~1/4 of the file. Print out 4 differnt json dicts, one per line. I'll do the merging. Do not import serde_json, write json output from scratch.

LLM Generation

Query

Write a self-contained Rust program that prints a JSON output of how often each word appears in a text file located in /tmp/file.txt. So if the file contains "This is is is, an example" then the program should print to stdout. {"This": 1, "is": 2, "is,": 1, "an": 1, "example": 1} Don't import any crates that would require a Cargo.toml file. I'll just compile it with `rustc yourfile.rs` and it should work. The program should be run by calling /path/to/rust_word_count with no arguments. Make it run in parallel on 4 cores at the same time, each job taking ~1/4 of the file. Print out 4 differnt json dicts, one per line. I'll do the merging. Do not import serde_json, write json output from scratch.

Output

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use std::collections::HashMap;
use std::fs;
use std::io::{self, ErrorKind};
use std::sync::Arc;
use std::thread;
use std::process;

const FILE_PATH: &str = "/tmp/file.txt";
const NUM_THREADS: usize = 4;

/// Formats a HashMap<String, usize> into a JSON string manually.
/// Example: {"word1": 10, "word2": 5}
fn format_json(map: &HashMap<String, usize>) -> String {
    if map.is_empty() {
        return "{}".to_string();
    }

    let mut result = String::new();
    result.push('{');

    let mut first = true;
    for (key, value) in map.iter() {
        if !first {
            result.push_str(", ");
        }
        // Basic JSON string escaping for the key (only handles quotes for simplicity)
        let escaped_key = key.replace('\\', "\\\\").replace('"', "\\\"");
        result.push('"');
        result.push_str(&escaped_key);
        result.push_str("\": ");
        result.push_str(&value.to_string());
        first = false;
    }

    result.push('}');
    result
}

/// Counts words in a given text slice.
fn count_words(text_slice: &str) -> HashMap<String, usize> {
    let mut counts = HashMap::new();
    for word in text_slice.split_whitespace() {
        // Don't add empty strings if there are multiple spaces
        if !word.is_empty() {
             *counts.entry(word.to_string()).or_insert(0) += 1;
        }
    }
    counts
}

fn main() {
    // 1. Read the file content
    let content = match fs::read_to_string(FILE_PATH) {
        Ok(text) => Arc::new(text), // Use Arc for safe sharing across threads
        Err(e) => {
            match e.kind() {
                ErrorKind::NotFound => eprintln!("Error: File not found at '{}'", FILE_PATH),
                ErrorKind::PermissionDenied => eprintln!("Error: Permission denied reading file '{}'", FILE_PATH),
                _ => eprintln!("Error reading file '{}': {}", FILE_PATH, e),
            }
            process::exit(1);
        }
    };

    if content.is_empty() {
        // Handle empty file: print empty JSON for each thread
        for _ in 0..NUM_THREADS {
            println!("{{}}");
        }
        return;
    }

    let mut thread_handles = vec![];
    let total_len = content.len();
    let mut chunk_start = 0;

    // 2. Divide work and spawn threads
    for i in 0..NUM_THREADS {
        let content_arc = Arc::clone(&content);

        // Calculate the approximate end of the chunk
        let mut chunk_end = (total_len * (i + 1)) / NUM_THREADS;

        // Adjust chunk_end to the next whitespace boundary (unless it's the last chunk)
        if i < NUM_THREADS - 1 && chunk_end < total_len {
            // Find the next whitespace character at or after the calculated chunk_end
            if let Some(boundary_pos) = content_arc[chunk_end..].find(|c: char| c.is_whitespace()) {
                chunk_end += boundary_pos;
                 // Advance past the whitespace itself if possible
                 if chunk_end + 1 < total_len {
                    chunk_end += 1;
                 }
            } else {
                // No whitespace found after chunk_end, give the rest to this thread
                chunk_end = total_len;
            }
        } else {
             // Ensure the last chunk goes exactly to the end
             chunk_end = total_len;
        }

        // Ensure start doesn't exceed end (can happen with very small files/many threads)
        let current_chunk_start = std::cmp::min(chunk_start, chunk_end);
        let current_chunk_end = chunk_end;

        // Spawn a thread to process this chunk
        let handle = thread::spawn(move || {
            // Get the slice for this thread
            // Check bounds carefully in case of empty slices
            let slice = if current_chunk_start < content_arc.len() && current_chunk_start < current_chunk_end {
                 &content_arc[current_chunk_start..current_chunk_end]
            } else {
                "" // Empty slice if start is out of bounds or start >= end
            };

            // Count words in the slice
            let word_counts = count_words(slice);

            // Format the result as JSON
            let json_output = format_json(&word_counts);

            // Print the JSON output for this thread
            // Use println! as it's implicitly synchronized (locks stdout)
            println!("{}", json_output);
        });

        thread_handles.push(handle);

        // Prepare for the next chunk
        chunk_start = chunk_end;

        // Optimization: If we've already processed the whole file, stop spawning threads
        if chunk_start >= total_len && i < NUM_THREADS -1 {
             // Print empty JSON for remaining threads
             for _ in (i+1)..NUM_THREADS {
                 println!("{{}}");
             }
             break;
        }
    }

    // 3. Wait for all threads to complete
    for handle in thread_handles {
        if let Err(e) = handle.join() {
            eprintln!("Error: A worker thread panicked: {:?}", e);
            // Depending on requirements, you might want to exit here or just report.
            // process::exit(1);
        }
    }
}
**To use this code:** 1. **Save:** Save the code above as a file named (for example) `word_count.rs`. 2. **Create Test File:** Create a file named `/tmp/file.txt` with some text content. For example: 
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    echo "This is a test file. This file is for testing the word count program. Count count count is is." > /tmp/file.txt
Or using the example from the prompt: 
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    echo "This is is is, an example" > /tmp/file.txt
3. **Compile:** Open your terminal and compile the Rust code: 
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    rustc word_count.rs
This will create an executable file named `word_count` in the current directory. 4. **Run:** Execute the compiled program: 
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    ./word_count
**Example Output (for "This is is is, an example"):** The output will depend slightly on how the whitespace splitting aligns with the chunk boundaries, but you should get 4 lines of JSON, potentially including empty ones if the file is very short. For the example "This is is is, an example", a possible output might look like (order might vary): 
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{"This": 1}
{"is": 1}
{"is,": 1, "is": 1}
{"an": 1, "example": 1}
Or if the file was longer and split differently: 
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{"This": 1, "is": 1}
{"is": 1, "is,": 1}
{"an": 1}
{"example": 1}
**Explanation:** 1. **Constants:** `FILE_PATH` and `NUM_THREADS` are defined. 2. **`format_json`:** This function takes a `HashMap` and manually constructs a JSON string representation. It handles basic key escaping (quotes) and comma placement. 3. **`count_words`:** This function takes a string slice (`&str`), splits it into words using `split_whitespace()`, and counts occurrences in a new `HashMap`. 4. **`main` Function:** * Reads the entire file content into a `String`. Handles potential file reading errors. * Wraps the `String` in an `Arc` (Atomic Reference Counted pointer) to allow safe sharing of the read-only data between multiple threads. * Calculates approximate chunk boundaries based on the total length and number of threads. * **Crucially**, it adjusts the calculated `chunk_end` to the *next* whitespace character. This prevents splitting words in the middle. The last chunk always goes to the end of the file. * It iterates `NUM_THREADS` times: * Clones the `Arc` (cheaply increases the reference count). * Calculates the exact `start` and `end` byte indices for the current thread's slice. * Spawns a new thread using `thread::spawn`. * The closure passed to `thread::spawn` captures the `Arc` and the slice boundaries. * Inside the thread: * It gets its specific `&str` slice from the shared `Arc<String>`. * Calls `count_words` on its slice. * Calls `format_json` to get the JSON string. * Prints the JSON string to standard output using `println!`. `println!` handles locking stdout, preventing garbled output from concurrent writes. * Stores the `JoinHandle` returned by `thread::spawn`. * After spawning, it waits for all threads to finish using `handle.join()`. It includes basic error handling in case a thread panics. * Includes logic to handle empty files and files shorter than the number of threads gracefully.

Extract Code

I extracted the following code from that output: 

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use std::collections::HashMap;
use std::fs;
use std::io::{self, ErrorKind};
use std::sync::Arc;
use std::thread;
use std::process;

const FILE_PATH: &str = "/tmp/file.txt";
const NUM_THREADS: usize = 4;

/// Formats a HashMap<String, usize> into a JSON string manually.
/// Example: {"word1": 10, "word2": 5}
fn format_json(map: &HashMap<String, usize>) -> String {
    if map.is_empty() {
        return "{}".to_string();
    }

    let mut result = String::new();
    result.push('{');

    let mut first = true;
    for (key, value) in map.iter() {
        if !first {
            result.push_str(", ");
        }
        // Basic JSON string escaping for the key (only handles quotes for simplicity)
        let escaped_key = key.replace('\\', "\\\\").replace('"', "\\\"");
        result.push('"');
        result.push_str(&escaped_key);
        result.push_str("\": ");
        result.push_str(&value.to_string());
        first = false;
    }

    result.push('}');
    result
}

/// Counts words in a given text slice.
fn count_words(text_slice: &str) -> HashMap<String, usize> {
    let mut counts = HashMap::new();
    for word in text_slice.split_whitespace() {
        // Don't add empty strings if there are multiple spaces
        if !word.is_empty() {
             *counts.entry(word.to_string()).or_insert(0) += 1;
        }
    }
    counts
}

fn main() {
    // 1. Read the file content
    let content = match fs::read_to_string(FILE_PATH) {
        Ok(text) => Arc::new(text), // Use Arc for safe sharing across threads
        Err(e) => {
            match e.kind() {
                ErrorKind::NotFound => eprintln!("Error: File not found at '{}'", FILE_PATH),
                ErrorKind::PermissionDenied => eprintln!("Error: Permission denied reading file '{}'", FILE_PATH),
                _ => eprintln!("Error reading file '{}': {}", FILE_PATH, e),
            }
            process::exit(1);
        }
    };

    if content.is_empty() {
        // Handle empty file: print empty JSON for each thread
        for _ in 0..NUM_THREADS {
            println!("{{}}");
        }
        return;
    }

    let mut thread_handles = vec![];
    let total_len = content.len();
    let mut chunk_start = 0;

    // 2. Divide work and spawn threads
    for i in 0..NUM_THREADS {
        let content_arc = Arc::clone(&content);

        // Calculate the approximate end of the chunk
        let mut chunk_end = (total_len * (i + 1)) / NUM_THREADS;

        // Adjust chunk_end to the next whitespace boundary (unless it's the last chunk)
        if i < NUM_THREADS - 1 && chunk_end < total_len {
            // Find the next whitespace character at or after the calculated chunk_end
            if let Some(boundary_pos) = content_arc[chunk_end..].find(|c: char| c.is_whitespace()) {
                chunk_end += boundary_pos;
                 // Advance past the whitespace itself if possible
                 if chunk_end + 1 < total_len {
                    chunk_end += 1;
                 }
            } else {
                // No whitespace found after chunk_end, give the rest to this thread
                chunk_end = total_len;
            }
        } else {
             // Ensure the last chunk goes exactly to the end
             chunk_end = total_len;
        }

        // Ensure start doesn't exceed end (can happen with very small files/many threads)
        let current_chunk_start = std::cmp::min(chunk_start, chunk_end);
        let current_chunk_end = chunk_end;

        // Spawn a thread to process this chunk
        let handle = thread::spawn(move || {
            // Get the slice for this thread
            // Check bounds carefully in case of empty slices
            let slice = if current_chunk_start < content_arc.len() && current_chunk_start < current_chunk_end {
                 &content_arc[current_chunk_start..current_chunk_end]
            } else {
                "" // Empty slice if start is out of bounds or start >= end
            };

            // Count words in the slice
            let word_counts = count_words(slice);

            // Format the result as JSON
            let json_output = format_json(&word_counts);

            // Print the JSON output for this thread
            // Use println! as it's implicitly synchronized (locks stdout)
            println!("{}", json_output);
        });

        thread_handles.push(handle);

        // Prepare for the next chunk
        chunk_start = chunk_end;

        // Optimization: If we've already processed the whole file, stop spawning threads
        if chunk_start >= total_len && i < NUM_THREADS -1 {
             // Print empty JSON for remaining threads
             for _ in (i+1)..NUM_THREADS {
                 println!("{{}}");
             }
             break;
        }
    }

    // 3. Wait for all threads to complete
    for handle in thread_handles {
        if let Err(e) = handle.join() {
            eprintln!("Error: A worker thread panicked: {:?}", e);
            // Depending on requirements, you might want to exit here or just report.
            // process::exit(1);
        }
    }
}

Check if all of the following conditions are true:

LLM Generation

Query

Below is some student's code. I asked them to parallelize some code. Do not judge if it is correct, I have test cases for that. Logic errors are okay. So are synatx errors. Just tell me if they tried to parallelize it. use std::collections::HashMap; use std::fs; use std::io::{self, ErrorKind}; use std::sync::Arc; use std::thread; use std::process; const FILE_PATH: &str = "/tmp/file.txt"; const NUM_THREADS: usize = 4; /// Formats a HashMap<String, usize> into a JSON string manually. /// Example: {"word1": 10, "word2": 5} fn format_json(map: &HashMap<String, usize>) -> String { if map.is_empty() { return "{}".to_string(); } let mut result = String::new(); result.push('{'); let mut first = true; for (key, value) in map.iter() { if !first { result.push_str(", "); } // Basic JSON string escaping for the key (only handles quotes for simplicity) let escaped_key = key.replace('\\', "\\\\").replace('"', "\\\""); result.push('"'); result.push_str(&escaped_key); result.push_str("\": "); result.push_str(&value.to_string()); first = false; } result.push('}'); result } /// Counts words in a given text slice. fn count_words(text_slice: &str) -> HashMap<String, usize> { let mut counts = HashMap::new(); for word in text_slice.split_whitespace() { // Don't add empty strings if there are multiple spaces if !word.is_empty() { *counts.entry(word.to_string()).or_insert(0) += 1; } } counts } fn main() { // 1. Read the file content let content = match fs::read_to_string(FILE_PATH) { Ok(text) => Arc::new(text), // Use Arc for safe sharing across threads Err(e) => { match e.kind() { ErrorKind::NotFound => eprintln!("Error: File not found at '{}'", FILE_PATH), ErrorKind::PermissionDenied => eprintln!("Error: Permission denied reading file '{}'", FILE_PATH), _ => eprintln!("Error reading file '{}': {}", FILE_PATH, e), } process::exit(1); } }; if content.is_empty() { // Handle empty file: print empty JSON for each thread for _ in 0..NUM_THREADS { println!("{{}}"); } return; } let mut thread_handles = vec![]; let total_len = content.len(); let mut chunk_start = 0; // 2. Divide work and spawn threads for i in 0..NUM_THREADS { let content_arc = Arc::clone(&content); // Calculate the approximate end of the chunk let mut chunk_end = (total_len * (i + 1)) / NUM_THREADS; // Adjust chunk_end to the next whitespace boundary (unless it's the last chunk) if i < NUM_THREADS - 1 && chunk_end < total_len { // Find the next whitespace character at or after the calculated chunk_end if let Some(boundary_pos) = content_arc[chunk_end..].find(|c: char| c.is_whitespace()) { chunk_end += boundary_pos; // Advance past the whitespace itself if possible if chunk_end + 1 < total_len { chunk_end += 1; } } else { // No whitespace found after chunk_end, give the rest to this thread chunk_end = total_len; } } else { // Ensure the last chunk goes exactly to the end chunk_end = total_len; } // Ensure start doesn't exceed end (can happen with very small files/many threads) let current_chunk_start = std::cmp::min(chunk_start, chunk_end); let current_chunk_end = chunk_end; // Spawn a thread to process this chunk let handle = thread::spawn(move || { // Get the slice for this thread // Check bounds carefully in case of empty slices let slice = if current_chunk_start < content_arc.len() && current_chunk_start < current_chunk_end { &content_arc[current_chunk_start..current_chunk_end] } else { "" // Empty slice if start is out of bounds or start >= end }; // Count words in the slice let word_counts = count_words(slice); // Format the result as JSON let json_output = format_json(&word_counts); // Print the JSON output for this thread // Use println! as it's implicitly synchronized (locks stdout) println!("{}", json_output); }); thread_handles.push(handle); // Prepare for the next chunk chunk_start = chunk_end; // Optimization: If we've already processed the whole file, stop spawning threads if chunk_start >= total_len && i < NUM_THREADS -1 { // Print empty JSON for remaining threads for _ in (i+1)..NUM_THREADS { println!("{{}}"); } break; } } // 3. Wait for all threads to complete for handle in thread_handles { if let Err(e) = handle.join() { eprintln!("Error: A worker thread panicked: {:?}", e); // Depending on requirements, you might want to exit here or just report. // process::exit(1); } } } Answer either 'The student passes' or 'The student fails'.

Output

The student passes.

Substring Evaluation

Testing if the previous output contains the string student passes: True

Run Code Interpreter

Running the following program: 

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use std::collections::HashMap;
use std::fs;
use std::io::{self, ErrorKind};
use std::sync::Arc;
use std::thread;
use std::process;

const FILE_PATH: &str = "/tmp/file.txt";
const NUM_THREADS: usize = 4;

/// Formats a HashMap<String, usize> into a JSON string manually.
/// Example: {"word1": 10, "word2": 5}
fn format_json(map: &HashMap<String, usize>) -> String {
    if map.is_empty() {
        return "{}".to_string();
    }

    let mut result = String::new();
    result.push('{');

    let mut first = true;
    for (key, value) in map.iter() {
        if !first {
            result.push_str(", ");
        }
        // Basic JSON string escaping for the key (only handles quotes for simplicity)
        let escaped_key = key.replace('\\', "\\\\").replace('"', "\\\"");
        result.push('"');
        result.push_str(&escaped_key);
        result.push_str("\": ");
        result.push_str(&value.to_string());
        first = false;
    }

    result.push('}');
    result
}

/// Counts words in a given text slice.
fn count_words(text_slice: &str) -> HashMap<String, usize> {
    let mut counts = HashMap::new();
    for word in text_slice.split_whitespace() {
        // Don't add empty strings if there are multiple spaces
        if !word.is_empty() {
             *counts.entry(word.to_string()).or_insert(0) += 1;
        }
    }
    counts
}

fn main() {
    // 1. Read the file content
    let content = match fs::read_to_string(FILE_PATH) {
        Ok(text) => Arc::new(text), // Use Arc for safe sharing across threads
        Err(e) => {
            match e.kind() {
                ErrorKind::NotFound => eprintln!("Error: File not found at '{}'", FILE_PATH),
                ErrorKind::PermissionDenied => eprintln!("Error: Permission denied reading file '{}'", FILE_PATH),
                _ => eprintln!("Error reading file '{}': {}", FILE_PATH, e),
            }
            process::exit(1);
        }
    };

    if content.is_empty() {
        // Handle empty file: print empty JSON for each thread
        for _ in 0..NUM_THREADS {
            println!("{{}}");
        }
        return;
    }

    let mut thread_handles = vec![];
    let total_len = content.len();
    let mut chunk_start = 0;

    // 2. Divide work and spawn threads
    for i in 0..NUM_THREADS {
        let content_arc = Arc::clone(&content);

        // Calculate the approximate end of the chunk
        let mut chunk_end = (total_len * (i + 1)) / NUM_THREADS;

        // Adjust chunk_end to the next whitespace boundary (unless it's the last chunk)
        if i < NUM_THREADS - 1 && chunk_end < total_len {
            // Find the next whitespace character at or after the calculated chunk_end
            if let Some(boundary_pos) = content_arc[chunk_end..].find(|c: char| c.is_whitespace()) {
                chunk_end += boundary_pos;
                 // Advance past the whitespace itself if possible
                 if chunk_end + 1 < total_len {
                    chunk_end += 1;
                 }
            } else {
                // No whitespace found after chunk_end, give the rest to this thread
                chunk_end = total_len;
            }
        } else {
             // Ensure the last chunk goes exactly to the end
             chunk_end = total_len;
        }

        // Ensure start doesn't exceed end (can happen with very small files/many threads)
        let current_chunk_start = std::cmp::min(chunk_start, chunk_end);
        let current_chunk_end = chunk_end;

        // Spawn a thread to process this chunk
        let handle = thread::spawn(move || {
            // Get the slice for this thread
            // Check bounds carefully in case of empty slices
            let slice = if current_chunk_start < content_arc.len() && current_chunk_start < current_chunk_end {
                 &content_arc[current_chunk_start..current_chunk_end]
            } else {
                "" // Empty slice if start is out of bounds or start >= end
            };

            // Count words in the slice
            let word_counts = count_words(slice);

            // Format the result as JSON
            let json_output = format_json(&word_counts);

            // Print the JSON output for this thread
            // Use println! as it's implicitly synchronized (locks stdout)
            println!("{}", json_output);
        });

        thread_handles.push(handle);

        // Prepare for the next chunk
        chunk_start = chunk_end;

        // Optimization: If we've already processed the whole file, stop spawning threads
        if chunk_start >= total_len && i < NUM_THREADS -1 {
             // Print empty JSON for remaining threads
             for _ in (i+1)..NUM_THREADS {
                 println!("{{}}");
             }
             break;
        }
    }

    // 3. Wait for all threads to complete
    for handle in thread_handles {
        if let Err(e) = handle.join() {
            eprintln!("Error: A worker thread panicked: {:?}", e);
            // Depending on requirements, you might want to exit here or just report.
            // process::exit(1);
        }
    }
}
And got the output: {"the": 4, "age": 2, "foolishness,": 1, "was": 4, "it": 4, "of": 4, "wisdom,": 1, "worst": 1, "best": 1, "times,": 2} {"incredulity,": 1, "the": 4, "it": 4, "season": 1, "Light,": 1, "was": 4, "of": 3, "belief,": 1, "epoch": 2} {"had": 1, "way": 1, "all": 2, "direct": 2, "before": 1, "going": 2, "the": 1, "other": 1, "we": 3, "to": 1, "Heaven,": 1, "nothing": 1, "were": 2, "us,": 1} {"of": 3, "us,": 1, "winter": 1, "was": 2, "the": 2, "it": 2, "spring": 1, "season": 1, "hope,": 1, "everything": 1, "despair,": 1, "we": 1, "before": 1, "had": 1, "Darkness,": 1} warning: unused import: `self` --> main.rs:4:15 | 4 | use std::io::{self, ErrorKind}; | ^^^^ | = note: `#[warn(unused_imports)]` on by default warning: 1 warning emitted

PyFunc

Resulting in output: [('Darkness,', 1), ('Heaven,', 1), ('Light,', 1), ('age', 2), ('all', 2), ('before', 2), ('belief,', 1), ('best', 1), ('despair,', 1), ('direct', 2), ('epoch', 2), ('everything', 1), ('foolishness,', 1), ('going', 2), ('had', 2), ('hope,', 1), ('incredulity,', 1), ('it', 10), ('nothing', 1), ('of', 10), ('other', 1), ('season', 2), ('spring', 1), ('the', 11), ('times,', 2), ('to', 1), ('us,', 2), ('was', 10), ('way', 1), ('we', 4), ('were', 2), ('winter', 1), ('wisdom,', 1), ('worst', 1)]

Equal Evaluation

Testing if the previous output equals the string [('Darkness,', 1), ('Heaven,', 1), ('Light,', 1), ('age', 2), ('all', 2), ('before', 2), ('belief,', 1), ('best', 1), ('despair,', 1), ('direct', 2), ('epoch', 2), ('everything', 1), ('foolishness,', 1), ('going', 2), ('had', 2), ('hope,', 1), ('incredulity,', 1), ('it', 10), ('nothing', 1), ('of', 10), ('other', 1), ('season', 2), ('spring', 1), ('the', 11), ('times,', 2), ('to', 1), ('us,', 2), ('was', 10), ('way', 1), ('we', 4), ('were', 2), ('winter', 1), ('wisdom,', 1), ('worst', 1)]: True

Final Answer: True