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 Ruby (2.7.1) (judge verdict: Wrong Answer)

N = gets.to_i
i = 0
N.times do
  D1 = rand(1..6)
  D2 = rand(1..6)
  if D1 == D2
    if i == 0
        i = 1
    elsif i == 1
        i = 2
    elsif i ==2 
        i = 3
        puts "Yes"
    end
  else
    i = 0
  end
  puts D1
  puts D2
end