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
public class Main {

	public static void main(String[] args) {
		
		char c = new java.util.Scanner(System.in).next().charAt(0);
		
		System.out.println(++c);
	}

}
