#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using Vi = vector<int>;
using Vd = vector<double>;
using Vs = vector<string>;
using Vc = vector<char>;
using Vll = vector<ll>;
using Pii = pair<int, int>;
using Pdd = pair<double, double>;
using Pll = pair<ll, ll>;
using Pis = pair<int, string>;
using Psi = pair<string, int>;
using Pss = pair<string, string>;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i, n, m) for (int i = (int)(n); i <= (int)(m); i++)


int main() {
    int x, y;
    cin >> x >> y;
    int a = (x + y) / 2;
    if (a < 6) cout << a + 6 << endl;
    else cout << a - 6 << endl;
    return 0;
}