public static void main(String args[]) throws Exception {
int testCases = Integer.parseInt(in.readLine());
for (int i = 0; i < testCases; i++) {
StringTokenizer tokenizer = new StringTokenizer(in.readLine());
int n = Integer.parseInt(tokenizer.nextToken());
Party party = new Party();
for (int j = 0; j < n; j++) {
Person person = new Person(j);
tokenizer = new StringTokenizer(in.readLine());
while (tokenizer.hasMoreTokens()) person.add(Integer.parseInt(tokenizer.nextToken()));
party.invite(person);
}
output(party);
out.println();
}
out.flush();
}