#include "bits/stdc++.h"

using namespace std;

#define filein freopen ("input.txt", "r", stdin)
#define fileout freopen ("output.txt", "w", stdout)

int main () {
	 ios::sync_with_stdio(false);
	 cin.tie(nullptr);
	 cout.tie(nullptr);
	 fileout;
	 int T = 10;
	 cout << T << '\n';
	 for (int test_case = 1; test_case <= T; ++test_case) {
		 int N = rand() % 500 + 1;
		 vector<int> a(N + 1);
		 cout << N << '\n';
		 for (int i = 1; i <= N; ++i) {
			 a[i] = rand() % 1000 + 1;
		 }
		 for (int i = 1; i <= N; ++i) {
			 cout << a[i] << ' ';
		 }
		 cout << '\n';
	 }
}


//~ T => (1 - 10)
//~ N => (1 - 500)
//~ Ai => (1 - 1000)