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: Wrong Answer)

var readline = require('readline');
 
var rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});
 
var mapping = {
  
}
var count = 0;
rl.on( "line", function(line) {
  count++;
  var shifts = 0;
  if (count === 1) {
    shifts = parseInt(line, 10);
  }
  else if (count === 2) {
    if (shifts === 0) {
      console.log(line);
      return;
    }
    var toBeReturned = '';
    for (var i = 0; i < line.length; i++) {
      var code = line.charCodeAt(i) + shifts;
      if (code > 90) code = code % 91 + 65;
      toBeReturned += String.fromCharCode(code);
    }
    console.log(toBeReturned);
    return;
  }
});