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)

Num=int(input())
String=input()
Library=[['A',1],['B',2],['C',3],['D',4],['E',5],['F',6],['G',7],['H',8],['I',9],['J',10],['K',11],['L',12],['M',13],['N',14],['O',15],['P',16],['Q',17],['R',18],['S',19],['T',20],['U',21],['V',22],['W',23],['X',24],['Y',25],['Z',26]]
newstring=''
for i in String:
    for j in range(0,25):
        if i==Library[j][1]:
            oldstring=newstring
            newstring=Library[(j+Num)%26][1]+oldstring
print(newstring)