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

int main()
{
    int nr,i,j,n;
    nr=0;
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    f>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
        {
        if(i%j!=0||i==1||j==1)
        {
            if(j%i!=0||i==1||j==1)
            {nr=nr+1;
            cout<<i<<j<<" ";}
        }
        }
    g<<nr;
    f.close();
    g.close();
    return 0;
}