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 int a;
  int b, i = 10, j = 1, bb;
  scanf("%lld%d", &a, &bb);
  b = bb;
  while (bb /= 10) i *= 10;
  while (i /= 10) {
    a += (b / i) * j;
    b %= i;
    j *= 10;
  }
  printf("%lld\n", a);
  return 0;
}