#include<bits/stdc++.h>
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;
  return 0;
}