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 len = S.length;
  var result = "";
  for (var i = 0; i < len; i++) {
    var num = S.charCodeAt(i);
    // console.log("%s", num);
    var new_num = num + N;
    if (new_num > 90) {
      new_num = new_num - 90 + 64;
    }
    result += String.fromCharCode(new_num);
  }
  console.log("%s", result);
}

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