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, i, n, c;
  while (~scanf("%d%d", &a, &b)) {
    for (c = 0; b >= 1; b /= 10) c *= 10, c += b % 10;
    printf("%d\n", a + c);
  }
  return 0;
}