#include <fstream>

using namespace std;

int n, k;

int v[19];

ofstream out ("combinari.out");

void back(int pas)
{
    int i;
    if (pas>k)
    {
        for (i=1; i<=k; i++)
            out<<v[i]<<" ";
        out<<"\n";
    }
    else
    {
        for (i=v[pas-1]+1; i<=n-k+pas; i++)
        {
            v[pas]=i;
            back(pas+1);
        }
    }
}

int main()
{
    ifstream in ("combinari.in");
    in>>n>>k;
    int i;
    back(1);
    return 0;
}