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 11.0.6) (judge verdict: Runtime Error)

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int N = Integer.parseInt(in.nextLine());
        int countDoublets = 0;
        boolean threeConsecutive = false;
        for (int i = 0 ; !threeConsecutive && i < N; i++) {
            String[] read = in.nextLine().split(" ");
            int d1 = Integer.parseInt(read[0]), d2 = Integer.parseInt(read[1]);
            if (d1 == d2) {
                countDoublets++;
                if (countDoublets == 3) {
                    System.out.println("Yes");
                    threeConsecutive = true;
                }
            } else {
                countDoublets = 0;
            }
        }

        if (!threeConsecutive)
            System.out.println("No");

    }
}