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: Runtime Error)

//
// Created by sposa on 19.09.2020.
//
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(){
    char st[1000];
    char s = 's';
    char s1='e';

    scanf("%s",&st);

    if(st[strlen(st)-1]!= 's'){
        strncat(st,&s, 1);
    }
    else{
        strncat(st,&s1,1);
        strncat(st,&s,1);
    }
    printf("%s",st);

    return 0;
}