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 JavaScript (node.js v5.12) (judge verdict: Accepted)

function Main(input) {
    var N = parseInt(input[0], 10);
    var S = input[1];
    var sList = S.split('');
    
    var alp = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
    var list = alp.split('');

    var result = [];

    for (var i = 0; i < S.length; i++) {
        var index = list.indexOf(sList[i]) + N;
        if (index > 25) {
            index = index - 26;
        }
        result.push(list[index]);
    }

    console.log(result.join(''));
}

Main(require("fs").readFileSync("/dev/stdin", "utf8").trim().split(/\n|\s/));