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: Runtime Error)

function Main(input) {
  const inputs = input.split('\n')
    .filter(v => v);
  const n = Number(inputs[0]);
  const strs = inputs[1]
    .split('');
  
  console.log(strs.map(function(s) {
    let c = s.charCodeAt() + n;
    if (c > 90) {
      c -= 26;
    }
    return String.fromCharCode(c)
  }).join(''));
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));