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 C (Clang 3.8.0) (judge verdict: Runtime Error)

#include <stdio.h>

#define LEN 255

int main(void)
{
  char string[LEN];
  char angou[LEN];
  int  key, number, i;
  
  scanf("%d", &key);
  scanf("%s", string);

  i = 0;
  while(string[i] != '\0'){
    number = (string[i] - 'A' + key) % 26;
    angou[i] = 'A' + number;
    ++i;
  }
  angou[i] = '\0';
  
  printf("%s\n", angou);
  
  return 0;
}