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++ (GCC 9.2.1) (judge verdict: Accepted)

#include <bits/stdc++.h>
#define fast_io                                                                \
    ios::sync_with_stdio(false);                                               \
    cin.tie(0)
using namespace std;
using ll = long long;
using P = pair<int, int>;
const int inf = 0x3f3f3f3f;
const int N = (int)1e3 + 5;
const int M = (int)1e5 + 5;
const int mod = (int)1e9 + 7;
const double esp = 1e-8;
int T;
//------------------------------
char s[N];
int main() {
    fast_io;
    cin >> s;
    int len = strlen(s);
    if (s[len - 1] == 's') {
        cout << s << "es" << endl;
    } else {
        cout << s << 's' << endl;
    }
    return 0;
}