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: Accepted)

<?php
  $N = trim(fgets(STDIN));
  $str = trim(fgets(STDIN));
  $list = range('A', 'Z');
  for($i=0;$i<strlen($str);$i++) {
      for($j=0;$j<26;$j++) {
          if($str[$i]==$list[$j]) {
              if($j+$N<=25) {
                echo $list[$j+$N];    
              }
              else {
                  echo $list[$j+$N-26];
              }
          }
      }
  }
  ?>