#include <iostream>
using namespace std;
int main()
{
    int a, b, N;
    cin >> N;
    for (b = 1; b <= N; b++)
    {
        if (b!=1)
            cout << "1/" << b << endl;
        for (a = 1; a < N; a++)
            if (b>a)
            {
                if ((b%a) != 0)
                    cout << a << "/" << b << endl;
            }
    }
    return 0;
}