#include<iostream>
#include<fstream>
using namespace std;

int cmmdc(int a, int b)
{
	int r;
	while (b!=0)
	{
		r=a%b;
		a=b;
		b=r;
	}
return a;
}

int main()
{
	int n, i, j;
	ifstream f;
	f.open("fractii.in");
	f>>n;
	f.close();
	ofstream g;
	g.open("fractii.out");
	for(i=1;i<=n;i++)
		for(j=1;j<=n;j++)
			if (cmmdc(i, j)==1) g<<i<<"/"<<j<<" ";
					
	g.close();		
	
	return 0;
}