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 Haskell (GHC 7.10.3) (judge verdict: Accepted)

import Data.List
import Data.Maybe

main :: IO ()
main = do
    c <- getChar
    let a = ['a'..'z']
        i = findIndex (==c) a
     in putChar $ a!!((fromJust i)+1)