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 Common Lisp (SBCL 1.1.14) (judge verdict: Accepted)

(defun next-alphabet ()
  (let ((n (read-char))
        (i))
    (setf i (char-code n))
    (format t "~c~%" (code-char (1+ i))))) 

(next-alphabet)