Problem:
Score : 100 points

Problem Statement

In 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.

Input

Input is given from Standard Input in the following format:

S

Output

Print the plural form of the given Taknese word.

Sample Input 1

apple

Sample Output 1

apples

apple ends with e, so its plural form is apples.

Sample Input 2

bus

Sample Output 2

buses

bus ends with s, so its plural form is buses.

Sample Input 3

box

Sample Output 3

boxs

Solution in PyPy3 (7.3.0) (judge verdict: Accepted)

import math


def main():
    # n = int(input())
    # n, k = map(int, input().split())
    # h = list(map(int, input().split()))
    s = input()
    # h = [int(input()) for _ in rane(n)]

    if s[len(s)-1] == "s":
        print(s+"es")
    else:
        print(s+"s")




if __name__ == '__main__':
    main()