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 (Clang 10.0.0) (judge verdict: Accepted)

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

int main(int argc, const char * argv[]) {
    // insert code here...
    char name[1000];
    char es[] = "es";
    char s[] = "s";
    scanf("%s", name);
    
//    printf("%s\n", name);
//    
//    printf( "文字列長 %lu\n", strlen(name) );
  
    if(name[strlen(name)-1]=='s'){
        // 文字列の連結
        strcat(name, es);
        printf("%s\n", name);
    }else{
        // 文字列の連結
        strcat(name, s);
        printf("%s\n", name);
    }
    
    return 0;
}