Next Alphabet

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.

Examples

Input

a

Output

b

Input

y

Output

z

inputFormat

Input

Input is given from Standard Input in the following format:

C

outputFormat

Output

Print the letter that follows C in alphabetical order.

Examples

Input

a

Output

b

Input

y

Output

z

样例

y

z