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 a1, a2;
int fz(int x) {
  int t = 0;
  while (x) {
    t *= 10;
    t += x % 10;
    x /= 10;
  }
  return t;
}
int main() {
  cin >> a1 >> a2;
  cout << a1 + fz(a2);
  return 0;
}