#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

int n, k;
vector<int> sol;
ofstream fout("combinari.out");

void bkt(int step) {
    if (step == k + 1) {
        for (int i = 1; i <= k; ++i)
            fout << sol[i] << (i == k ? "" : " ");

        fout << "\n";
        return;
    }

    for (int i = sol[step - 1] + 1; i <= n - k + step; ++i) {
        sol[step] = i;
        bkt(step + 1);
    }
}

int main() {
    ifstream fin("combinari.in");
    
    fin >> n >> k;

    sol.assign(k + 1, 0);
    
    sol[0] = 0;

    bkt(1);

    fin.close();
    fout.close();

    return 0;
}