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 PHP (5.6.30) (judge verdict: Accepted)

<?php

fscanf(STDIN, "%d", $num);
$array = str_split(trim(fgets(STDIN)));

$moji = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
$mojiArray = str_split($moji);

$newArray = array();
foreach ($array as $k => $v) {
  $mojiNum = array_search($v, $mojiArray) + $num;

  if ($mojiNum >= 26 ) $mojiNum -= 26;

  $newArray[] = $mojiArray[$mojiNum];
}

foreach ($newArray as $key => $value) {
  echo $value;
}