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 inputs = input.split("\n");
    var N = parseInt(inputs[0], 10);
    var S = inputs[1];
    var _S = "";
    for(var i=0;i<S.length;i++) {
        var ts = S.charCodeAt(i);
        ts += N;
        if(ts > 90) {
            ts -= 26;
        }
        _S += String.fromCharCode(ts);
    }
    console.log(_S);
}

main(require('fs').readFileSync('/dev/stdin', 'utf8'));