#include <fstream>
using namespace std;
ifstream fin("combinari.in");
ofstream fout("combinari.out");
int n,k,v[19];

void backtrack(int p) {
    if (p==k+1) {
        for (int i=1;i<=k;i++)
            fout<<v[i]<<" ";
        fout<<"\n";
    }
    else
        for (int i=v[p-1]+1;i<=n;i++) {
            v[p]=i;
            backtrack(p+1);
        }
}

int main() {
    fin>>n>>k;
    v[0]=0;
    backtrack(1);
    return 0;
}