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 PHP7 (7.0.15) (judge verdict: Wrong Answer)

<?php
  $n = trim(fgets(STDIN));
  $s = trim(fgets(STDIN));

  for($i=0; $i<strlen($s); $i++){
    $enc = hexdec(bin2hex($s[$i]));
    if($enc+$n > 90){
      $step = 65+($enc-90)+1;
    }else{
      $step = $enc+$n;
    }
    echo hex2bin(dechex($step));
  }
  echo "\n";