#include <algorithm>
#include <fstream>
#include <iterator>
#include <vector>

void print(const int, const int, std::ostream &);

int main()
{
    std::ifstream fin("combinari.in");
    std::ofstream fout("combinari.out");

    int n, k;
    fin >> n >> k;

    print(n, k, fout);

    return 0;
}

void backtracking(
    const int level,
    const int N,
    const int K,
    const int previous,
    std::vector<int> &V,
    std::ostream &out)
{
    if (level == K)
    {
        std::copy(V.begin(), V.end(), std::ostream_iterator<int>(out, " "));
        out << '\n';
        return;
    }

    for (int i = previous + 1; i <= N - K + 1 + level; ++i)
    {
        V[level] = i;
        backtracking(level + 1, N, K, i, V, out);
    }
}

void print(const int N, const int K, std::ostream &out)
{
    std::vector<int> V(K, 0);

    backtracking(0, N, K, 0, V, out);
}