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() {
  int n;
  string m;
  cin >> n >> m;
  int mi = 1;
  for (int i = 0; i < m.length(); i++) {
    n += (m[i] - '0') * mi;
    mi *= 10;
  }
  cout << n << endl;
  return 0;
}