#include <iostream>
#include <fstream>
#include <vector>
using namespace std;

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

int comb[19], n, k;

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

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