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 rev(int n) {
  int res = 0;
  while (n) {
    res = res * 10 + n % 10;
    n /= 10;
  }
  return res;
}
int main() {
  int a1, a2;
  cin >> a1 >> a2;
  cout << a1 + rev(a2) << endl;
  return 0;
}