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 Python (3.4.3) (judge verdict: Wrong Answer)

N=int(input())
S=list(input())
c=["A","B","C","D","E","F","G","H","I","J","K","L"
   ,"M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"]
d=[]
Z=c*(1+N)
for i in range(len(c)):
  for k in range(len(S)):
    if Z[i]==S[k]:
      d.append(Z[i+N])
print("".join(d))