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# (Mono 4.6.2.0) (judge verdict: Runtime Error)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            //入力
            String[] input = Console.ReadLine().Split(' ');
            int num = int.Parse(input[0]);
            string str = input[1];

            StringBuilder result = new StringBuilder();
            for(int i = 0; i < str.Length; i++)
            {
                Char strToChar = str[i];
                int charToInt = (int)strToChar;

                charToInt = charToInt + num;
                if (charToInt > 90)
                {
                    charToInt = charToInt - 26;
                }
                Char tmpChar = (Char)charToInt;
                String resultStr = tmpChar.ToString();
                result.Append(resultStr);
            }

            Console.WriteLine(result.ToString());

        }
        
    }
}