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
An anonymized string \(S\) of length between 1 and 1000, inclusive. The string contains 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 plural_form(word):
if word.endswith('s'):
return word + 'es'
else:
return word + 's'
def tcgen():
# Length of the word (between 1 and 1000)
length = random.randint(1, 1000)
# Generating a random word of the given length
word = ''.join(random.choices(string.ascii_lowercase, k=length))
# Return the word and its plural form (expected output for validation)
return word, plural_form(word)
# Example usage:
word, plural = tcgen()
print(f"Input: {word}")
print(f"Expected Output: {plural}")
```
This generator will create test cases with random Taknese words of lengths between 1 and 1000 and will also provide the expected plural form based on the rules specified. You can use this to generate multiple test cases and validate your solution against the expected output.
To run the test case generator and see an example:
```python
for _ in range(10): # Generate 10 test cases
word, plural = tcgen()
print(f"Input: {word}")
print(f"Expected Output: {plural}")
print() # Newline for readability
```
Extract Arguments
def extract_arguments(fh):
S = fh.readline().strip()
return S