Problem Statement

The ASCII values of the lowercase English letters $a, b, \ldots, z$ are $97,98,\ldots,122$ in this order.
Given an integer N between 97 and 122, print the letter whose ASCII value is N.

Input

Input is given from Standard Input in the following format:
N

Output

Print the answer.

Constraints

• N is an integer between 97 and 122 (inclusive).

Sample Input 1

97

Sample Output 1

a

97 is the ASCII value of a.

Sample Input 2

122

Sample Output 2

z

见题面 Input 部分

见题面 Output 部分