Problem Statement

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

Input

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

Output

Print the letter that follows C in alphabetical order.

Constraints

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

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.

见题面 Input 部分

见题面 Output 部分