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 JavaScript (Node.js 12.16.1) (judge verdict: Accepted)

process.stdin.resume()
process.stdin.setEncoding('utf8')
var g_input = ''
process.stdin.on('data', function(chunk) {
    g_input += chunk
})
process.stdin.on('end', function() {
    main(g_input.split(/\r?\n/))
})
function main(input){
  input = input[0]
  input = `${input}${input[input.length-1]=='s'?'es':'s'}`
  console.log(input)
}