#include <fstream>
using namespace std;

ifstream is("combinari.in");
ofstream os("combinari.out");

int N, K;
int x[21];

void Write();
void Comb(int k);

int main()
{
	is >> N >> K;
	Comb(1);
	
	is.close();
	os.close();
}

void Write()
{
	for ( int i = 1; i <= K; ++i )
		os << x[i] << " ";
}

void Comb(int k)
{
	if ( k == K+1 )
	{
		Write();
		os << '\n';
		return;
	}
	for ( int i = x[k-1] + 1; i <= N-K+k; ++i )
	{
		x[k] = i;
		Comb(k+1);
	}
}