#include<iostream>
using namespace std;

int main() {
	int x, y, z,k;
	cin >> x >> y;
	z = max(x, y);
	k = min(x, y);
	if (z < 8) cout << z + 4 << endl;
	else if(z>=8 and k>z-8) cout << z-8 << endl;
	else cout << k+4 << endl;

	return 0;
}