# include <bits/stdc++.h>

using namespace std;

int main ()
{
    freopen("xerox.in", "r", stdin);
    freopen("xerox.out", "w", stdout);

    int tests, n, dx, dy, x, y, i, j, m;

    scanf("%d\n", &tests);

    for ( ; tests; --tests)
    {
        scanf("%d %d %d\n", &n, &dx, &dy);

        int XOR = 0;

        for (i = 1; i <= n; ++i)
        {
            scanf("%d ", &m);

            XOR ^= m;

            for (j = 1; j <= m; ++j)
                scanf("%d %d", &x, &y);
        }

        printf("%d\n", XOR);
    }

    return 0;
}