#include <fstream>
#include <iostream>
#include <vector>
using namespace std;
ifstream in("combinari.in");
ofstream out("combinari.out");
int n, k, used[18], first = 0;

void bt(int start_index, std::vector<int>& crt_sol) {

	if (crt_sol.size() == k) {
		if (first != 0)
			out << "\n";
		else first = 1;
		for (int i = 0; i < k; i++)
			out << crt_sol[i] << " ";
	}
	for (int i = start_index; i <= n; i++) {
		
		crt_sol.push_back(i);
		bt(i + 1, crt_sol);
		crt_sol.pop_back();
	}
}
int main () {

	in >> n >> k;
	in.close();
	std::vector<int> sol;
	for (int i = 0; i <= 18; i++)
		used[i] = 0;
	bt(1, sol);
}