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# (Mono-mcs 6.8.0.105) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AtCoder179
{
    class Program
    {
        static int[] RI()
        {
            return Console.ReadLine().Split(' ').Select(a => int.Parse(a)).ToArray();
        }

        static long[] RL()
        {
            return Console.ReadLine().Split(' ').Select(a => long.Parse(a)).ToArray();
        }

        static string RS()
        {
            return Console.ReadLine();
        }

        static void W(object msg)
        {
            Console.WriteLine(msg);
        }

        static void Main(string[] args)
        {
            QA();
        }

        private static void QA()
        {
            string line = RS();
            W(line + (line.EndsWith("s") ? "es" : "s"));
        }

        private static void QB()
        { 

        }

        private static void QC()
        {
 
        }

        private static void QD()
        {

        }

        private static void QE()
        {

        }
    }
}