#include <bits/stdc++.h> using namespace std; int n, m, k, l, r, a[100001], ai, bi, counter; bool flag; int main() { cin >> n >> m; counter = m; for (int i = 0; i < m; ++i){ cin >> ai; a[ai] = 1; } cin >> k; for (int i = 0; i < k; i++){ cin >> l >> r; flag = true; for (int j = 0; j < l; ++j){ cin >> bi; if (not a[bi]) flag = false; } for (int j = 0; j < r; j++){ cin >> bi; if (flag and not a[bi]){ counter++; a[bi] = 1; } } } cout << counter << endl; for (int i = 0; i < 100001; i = i + 1){ if (a[i]) cout << i << " "; } return 0; }