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 a, b, i = 0;
  cin >> a >> b;
  do {
    i += b % 10;
    i *= 10;
    b = b / 10;
  } while (b != 0);
  cout << (a + (i / 10));
  return 0;
}