Problem:
Score : 100 points

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.

Solution in Ruby (2.3.3) (judge verdict: Runtime Error)

C = ARGV[0]
if C == a then
 puts "b"
 elseif C==b then
 puts "c"
elseif C==c
 puts "d"

 elseif C==d then
 puts "e"
elseif C==e
 puts "f"

 elseif C==f then
 puts "g"
elseif C==g
 puts "h"

 elseif C==h then
 puts "i"
elseif C==i
 puts "j"