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 Java8 (OpenJDK 1.8.0) (judge verdict: Wrong Answer)

import java.util.*;

public class Main {
  static final String ascii = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int index = sc.nextInt();
    String s = sc.next();
    
    String replaced = "";
    for (int i = 0 ; i < s.length() ; i++){
      char c = s.charAt(i);
      int si = ascii.indexOf(c);
      int ri = si + index;
      if(ri > ascii.length()){
        ri = ri - ascii.length();
      }
      replaced = replaced + ascii.indexOf(ri);
    }
    System.out.println(replaced);
  }
}