#include<fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int n,s;
float a,i,j,b;
int euclid(int a, int b)
{
    int c;
    while (b) {
        c = a % b;
        a = b;
        b = c;
    }
    if(a==1)
        return 1;
    else
        return 0;
}
int main()
{f>>n;
for(i=1;i<=n;i++)
{for(j=1;j<=n;j++)
{if(euclid(i,j)==1)
g<<i<<"/"<<j<<'\n';}
}
}