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 C++ (GCC 9.2.1) (judge verdict: Wrong Answer)

#include <set> 
#include <string> 
#include <iomanip> 
#include <stdio.h>
#include <iostream>
using namespace std;

int main(){
    char matubi;
    char takahashi[1000];
    cin >> takahashi;

    matubi = takahashi[sizeof(takahashi)/sizeof(takahashi[0]) - 1];
    if(matubi == 's'){
        cout << takahashi << "es";
    } else {
        cout << takahashi << "s";
    }

    return 0;
}