#include"bits/stdc++.h"
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define int long long
const long long mod = 998244353;
typedef pair<int, int> P;

signed main() {
	int a, b; cin >> a >> b; 
	if (a + b == 5)cout << 6 << endl;
	else cout << a + b << endl;
}