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: Runtime Error)

<?php
  
  $a = (int)fgets(STDIN);
  $b = fgets(STDIN);
  $c = str_split($b);

  foreach($c as &$d){
      for($i=0; $i<$a; $i++){
          ++$d;
      }
      if(mb_strlen($d) === 2){
          $d = substr( $d , 1 , strlen($d)-1 );
      }
      echo $d;
      unset($d);
  }