int n, m, s; cin >> m >> n;
    s = 1;
    vv <vv<pair<int, int>>>area(n + 1);
    forn(i, 1, m, 1) {
        vv<int>all;
        char ch;
        do {
            int a; cin >> a;
            all.push_back(a);
            ch = getchar();
        } while (ch == ' ');
        forn(i, 0, all.size() - 1, 1)
            forn(j, i + 1, all.size() - 1, 1)
                 area[all[i]].push_back({ all[j],1 });
    }