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 (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>

int main(void) {
  int N, t;
  int i = 0;
  char str[10000];

  scanf("%d", &N);
  scanf("%s", str);
  
  while ('A' <= str[i] && str[i] <= 'Z') {
    t = str[i] + N;
    if (t > 'Z') {
      t -= 26;
    }
    str[i] = t;
    i++;
  }
  i = 0;
  while ('A' <= str[i] && str[i] <= 'Z') {
    printf("%c", str[i]);
    i++;
  }
  putchar('\n');

  return 0;
}