#include <bits/stdc++.h>
#include <cstdio>
using namespace std;
int main()
{
    cout << "000"<< endl;
    cout << "001"<< endl;
    cout << "010"<< endl;
    cout << "011"<< endl;
    cout << "100"<< endl;
    cout << "101"<< endl;
    cout << "110"<< endl;
    cout << "111"<< endl;
    cout << ""<< endl;
    return 0;
}