#include<fstream>
#include<vector>
using namespace std;
int N,P,Q;
vector<int>fractii(0);
int main()
{
    ifstream fin("fractii.in");
    ofstream fout("fractii.out");
    fin>>N;
 int counter;
 for(P=1;P<=N;P++)
  for(Q=1;Q<=N;Q++)
  {
   if((P%Q)||(Q%P))
   fout<<P<<"/"<<Q<<" ";
  }
  return 0;
}