Problem Statement

Given is a lowercase English letter $C$ that is not z. Print the letter that follows $C$ in alphabetical order.

Constraints

• $C$ is a lowercase English letter that is not z.

Input

Input is given from Standard Input in the following format:

$C$

Output

Print the letter that follows $C$ in alphabetical order.

Sample Input 1

a

Sample Output 1

b

a is followed by b.

Sample Input 2

y

Sample Output 2

z

y is followed by z.