If you are new to learning programming and do not know where to start, please try Problem A “Welcome to AtCoder” from practice contest. There you can find a sample code for each language.
Also, if you are not familiar with problems in programming contests, we recommend you to try some problems in “AtCoder Beginners Selection” (https://atcoder.jp/contests/abs).

This problem can be solved by receiving a string form the input, appending s, and printing the resulting string.

Different languages have different ways to receive input, appending a character to a string, and printing output. Below is sample code in C++, Python 3, and Java.

Sample code (C++)

#include <bits/stdc++.h>
using namespace std;
int main() {
	string s;
	cin >> s;
	s += 's';
	cout << s << endl;
	return 0;
}

Sample code (Python 3)

s = input()
s += 's'
print(s)

Sample code (Java)

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        s += "s";
        System.out.println(s);
    }
}