#include <fstream>

using namespace std;

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

int n, x, a[20];

void back(int k) {
    if (k == x + 1) {
        for (int i = 1; i <= x; ++i){
            fout << a[i] << ' ';
        }
        fout << "\n";
        return;
    }
    for (int i = a[k - 1] + 1; i <= n; ++i) {
        a[k] = i;
        back(k + 1);
    }
}

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