#include<bits/stdc++.h>
using namespace std;
#define V vector
#define pb push_back
#define fi first
#define se second
#define all1(x) (x).begin() + 1, (x).end()
typedef pair<int, int> pi;


int main() {
    int k; cin >> k;
    for(int i = 1; i <= k; i++) {
        cout << 4 << endl;
        cout << 0 << " " << 1 << endl;
        cout << 1 << " " << 0 << endl;
        cout << 2 + 2 * i << " " << 0 + i << endl;
        cout << -1 << " " << -1 << endl;
    }
}