Problem p02546 - Generation 3

Orig Description

Score : 100 points
Problem StatementIn the Kingdom of AtCoder, people use a language called Taknese, which uses lowercase English letters.
In Taknese, the plural form of a noun is spelled based on the following rules:
If a noun's singular form does not end with s, append s to the end of the singular form.
If a noun's singular form ends with s, append es to the end of the singular form.
You are given the singular form S of a Taknese noun. Output its plural form.
Constraints
S is a string of length 1 between 1000, inclusive.
S contains only lowercase English letters.
InputInput is given from Standard Input in the following format:
S
OutputPrint the plural form of the given Taknese word.
Sample Input 1apple
Sample Output 1apples
apple ends with e, so its plural form is apples.
Sample Input 2bus
Sample Output 2buses
bus ends with s, so its plural form is buses.
Sample Input 3box
Sample Output 3boxs

Extracted Specification

Canonicalized Input Description:

A string S of length between 1 and 1000, inclusive, containing only lowercase English letters.

### Example Input:

```
apple
```

### Function Signature:
Write a function f(S) that takes in the input. 
```python
def f(S: str):
    '''
    S: a string
    '''
```

Test Case Generator

Certainly! Below is the test case generator for the given problem statement:

```python
import random
import string

def generate_random_string(n):
    return ''.join(random.choices(string.ascii_lowercase, k=n))

def tcgen():
    # Length of the string S, which is between 1 and 1000 inclusive
    length = random.randint(1, 1000)

    # Generate a random lowercase string of the determined length
    S = generate_random_string(length)
    
    return S

# Example usage of the test case generator
for _ in range(5):  # Generate 5 test cases
    print(tcgen())
```

**Explanation:**
1. `generate_random_string(n)`: This helper function generates a random string of length `n` composed of lowercase English letters.
2. `tcgen()`: This function generates a random length for the string `S` between 1 and 1000 inclusive, then generates a random string of that length using the helper function.
3. The example usage shows how to generate and print 5 test cases.

This script will provide you with a variety of test cases that adhere to the constraints specified in your problem statement.

Extract Arguments

def extract_arguments(fh):
    S = fh.readline().strip()
    return S