Problem: <image>

Input

The input contains two integers a1, a2 (0 ≤ ai ≤ 32), separated by a single space.

Output

Output a single integer.

Examples

Input

1 1


Output

0


Input

3 7


Output

0


Input

13 10


Output

1

Solution (in JAVA):

Solution:
import java.util.Scanner;

public class Prob171A {
	public static void main(String[] Args) {
		Scanner in = new Scanner(System.in);
		int a1 = in.nextInt();
		int a2 = in.nextInt();
		int x = 0;
		while (a2 > 0)
		{
			x = x * 10 + a2 % 10;
			a2 /= 10;
		}
		System.out.println(a1 + x);
	}
}