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 CPP):

Solution:
#include <bits/stdc++.h>
int main() {
  int a, b, r = 0;
  scanf("%d %d", &a, &b);
  while (b) {
    r = 10 * r + b % 10;
    b /= 10;
  }
  printf("%d", a + r);
  return 0;
}