#include<fstream>
using namespace std;
int aux[20],n,k;
ifstream fin("combinari.in");
ofstream fout("combinari.out");

void back(int pos) {
     if (pos==k+1) {
                   for (int t=1; t<=k; ++t) fout<<aux[t]<<" ";
                   fout<<"\n";
                   }
     else for (int i=aux[pos-1]+1; i<=n-k+pos; ++i)  {
                          aux[pos]=i;
                          back(pos+1);
                          }
}

int main(void) {
    fin>>n>>k;
    back(1);
    return(0);
}