#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define double long double;
#define pb push_back
#define endl '\n'
#define er erase
#define sz size
#define in insert
#define mp make_pair
#define fs first
#define sc second
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define mod 1000000007
#define INF LONG_LONG_MAX

int a, b;
vector<int> ans;

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

void comb(int n, int k)
{

    if(ans.sz()==k)
    {
        for(int x:ans)
            fout<<x<<' ';
        fout<<endl;
        ans.er(ans.begin()+k-1);
        return;
    }
    else
    {
        int s=0;
        if(ans.empty()){s=0;}else{s=ans.back();}
        for(int i=s+1;i<=n;i++)
        {
            ans.pb(i);
            comb(n, k);
        }
        ans.er(ans.begin()+(ll)ans.sz()-1);
        return;
    }
}

void solve()
{
    fin>>a>>b;
    comb(a, b);
}

int32_t main()
{
    //ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    ll tc=1;
    //cin>>tc;
    while(tc--)
    {
        solve();
    }
    return 0;
}