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 a1, a2, cal = 0;
  cin >> a1 >> a2;
  while (1) {
    cal = cal + a2 % 10;
    a2 = a2 / 10;
    if (a2 == 0) break;
    cal = cal * 10;
  }
  cout << a1 + cal << endl;
  return 0;
}