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 PyPy3 (2.4.0) (judge verdict: Accepted)

from copy import deepcopy
from sys import exit,setrecursionlimit
import math
from collections import defaultdict,Counter,deque
from itertools import permutations, combinations,combinations_with_replacement,product
from fractions import Fraction as frac
import bisect
import heapq

import logging
logging.basicConfig(level=logging.DEBUG)

import sys
#input = sys.stdin.readline().rstrip

setrecursionlimit(1000000)

MOD = 10**9+7
INF = float('inf')

def main():
    N=int(input())
    S=input()
    A='ABCDEFGHIJKLMNOPQRSTUVWXYZ'

    ans=[]
    for c in S:
        i=A.index(c)
        ans.append(A[(i+N)%26])
    print("".join(ans))
main()