#include <fstream>

using namespace std;

ifstream fin("combinari.in");
ofstream fout("combinari.out");

long s[21]={0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20};
long n,k;
void inapoi(long l)
{
    int i;
    if(l==k)
    {
     for(i=1;i<=k;i++)
            fout<<s[i]<<" ";
        fout<<"\n";
    }
    else
    {
        for(i=s[l]+1;i<=n;i++)
        {
            s[l+1]=i;
            inapoi(l+1);
        }
    }
}

int main()
{
    fin>>n>>k;
    inapoi(0);
    fin.close();
    fout.close();
    return 0;
}