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() {
  long long t = 1;
  while (t--) {
    long long a, b, sum = 0;
    scanf("%lld%lld", &a, &b);
    while (b > 0) {
      int r = b % 10;
      sum = sum * 10 + r;
      b = b / 10;
    }
    sum += a;
    printf("%lld", sum);
  }
  return 0;
}