Problem Statement

You are given an integer $K$.

Print a string that is a concatenation of the first $K$ uppercase English letters in ascending order, starting from A.

Constraints

• $K$ is an integer between $1$ and $26$, inclusive.

Input

The input is given from Standard Input in the following format:

$K$

Output

Print the answer.

Sample Input 1

3

Sample Output 1

ABC

The uppercase English letters in ascending order are A, B, C, ...

By concatenating the first three uppercase English letters, we get ABC.

Sample Input 2

1

Sample Output 2

A