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){
    // Your code here!
    char s[1005];
    int str;
    
    char s2[]="es";
    int i;
    scanf("%s",s);
    str=strlen(s);
    if(s[str-1]==115){
        strcat(s,s2);
        printf("%s",s);
        
    }
    else if(s[str-1]!=115){
        s[str]=115;
        for(i=0;i<str+1;i++){
            printf("%c",s[i]); 
        }
    }
    
    
    return 0;
}