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;
const double PI = acos(-1.0);
int a;
string s;
int main() {
  cin >> a >> s;
  int i = ((int)s.length()) - 1, x = 0;
  while (i >= 0) {
    x = x * 10 + s[i] - 48;
    i--;
  }
  cout << a + x;
  return 0;
}