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 Java (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.*;

/**
 * A Main
 *
 * @date 2020.09.19
 * @author 焼き鮭 <yaki-shake@up-tri.me>
 */

public class Main {
  Scanner sc;

  public static void main(String[] args) {
    new Main().execute();
  }

  public void execute() {
    this.sc = new Scanner(System.in);
    String _s = sc.next();
    String[] s = _s.split("");
    System.out.println(_s + (s[s.length - 1].equals("s") ? "es" : "s"));
  }
}