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 PyPy3 (7.3.0) (judge verdict: Accepted)

def main():
    import sys
    input = sys.stdin.readline
    sys.setrecursionlimit(10**7)
    from collections import Counter, deque
    from collections import defaultdict
    from itertools import combinations, permutations, accumulate, groupby, product
    from bisect import bisect_left,bisect_right
    from heapq import heapify, heappop, heappush
    from math import floor, ceil,pi,factorial
    from operator import itemgetter
    def I(): return int(input())
    def MI(): return map(int, input().split())
    def LI(): return list(map(int, input().split()))
    def LI2(): return [int(input()) for i in range(n)]
    def MXI(): return [[LI()]for i in range(n)]
    def SI(): return input().rstrip()
    def printns(x): print('\n'.join(x))
    def printni(x): print('\n'.join(list(map(str,x))))
    inf = 10**17
    mod = 10**9 + 7
#main code here!
    s=SI()
    if s[-1]=="s":
        print(s+"es")
    else:
        print(s+"s")

        
        
        
        



        
        
        
        
        
    
if __name__=="__main__":
    main()