# Caesar Cipher

Tough Dash, February 2019...
Limits 1s, 512 MB

Byang wants to write a secret message to his friend. He has recently discovered Caesar Cipher.

Caesar cipher is simple encryption techniques where each letter in the message is replaced by a letter some fixed number of positions down the alphabet.

For example, with a left shift of 2, C would be replaced by A, D would become B, and so on.

Letters:

ABCDEFGHIJKLMNOPQRSTUVWXYZ


After applying Caesar cipher of left shift 2:

YZABCDEFGHIJKLMNOPQRSTUVWX


## Input

The first line of the input will contain one integer $N$ ($0 < N < 26$), indicating the left shift of the cipher.

The second line will contain a message in all lower case alphabets and spaces. The message will contain at most 100 characters.

## Output

Print the message after applying the Ceaser cipher using the specified left shift.

## Sample

InputOutput
2
hello world

fcjjm umpjb