Problem:
Score : 200 points

Problem Statement

We have a string S consisting of uppercase English letters. Additionally, an integer N will be given.

Shift each character of S by N in alphabetical order (see below), and print the resulting string.

We assume that A follows Z. For example, shifting A by 2 results in C (A \to B \to C), and shifting Y by 3 results in B (Y \to Z \to A \to B).

Constraints

0 \leq N \leq 26

1 \leq |S| \leq 10^4

S consists of uppercase English letters.

Input

Input is given from Standard Input in the following format:

N
S

Output

Print the string resulting from shifting each character of S by N in alphabetical order.

Sample Input 1

2
ABCXYZ

Sample Output 1

CDEZAB

Note that A follows Z.

Sample Input 2

0
ABCXYZ

Sample Output 2

ABCXYZ

Sample Input 3

13
ABCDEFGHIJKLMNOPQRSTUVWXYZ

Sample Output 3

NOPQRSTUVWXYZABCDEFGHIJKLM

Solution in C# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;

namespace test2 {

    public class Program {

        public static void Main(string[] args) {

            var n = int.Parse(Console.ReadLine());
            var s = Console.ReadLine().ToCharArray();

            for(var i = 0; i < s.Length; i++) {

                var tmp = s[i];
                var x = tmp - 'A';
                x = (x + n) % 26;

                s[i] = (char)('A' + x);

            }

            Console.WriteLine(s);

        }

    }

}