/**
 * author o2o9
 * date 2021-03-24
 */
#include <bits/stdc++.h>

using namespace std;
#define ll long long

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
  int a,b;
  cin >> a >> b;
  int ans = a | b;
  int cnt = a & b;
  cout << ans + cnt << '\n';
  return 0;
}