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: Accepted)

#include <stdio.h>
#include<string.h>

int main(void){
    // 自分の得意な言語で
    // Let's チャレンジ！！

    char str[1500];
    
    

    scanf("%s",str);
    int len=strlen(str);

    if(str[len-1]=='s'){
        str[len]='e';
        str[len+1]='s';

    for(int i=0;i<len+2;i++){
          printf("%c",str[i]);
      }

    }else{
        str[len]='s';

        for(int i=0;i<len+1;i++){
          printf("%c",str[i]);
      }
    }
    
      printf("\n");
      
      
   


   
    
    return 0;
}