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>
using namespace std;
int main() {
  long long a1, a2, q = 0, k, r = 0, sd = 1;
  cin >> a1 >> a2;
  k = a2;
  while (k > 0) {
    r++;
    k /= 10;
  }
  for (int i = 0; i < r; i++) sd *= 10;
  while (a2 > 0) {
    q += (a2 % 10) * sd;
    sd /= 10;
    a2 /= 10;
  }
  cout << a1 + (q / 10);
  return 0;
}