#include <iostream>
#include <cstdio>
using namespace std;
FILE *intrare,*iesire;
int n,k,v[100];

void backtracking (int pos)
{
    int i,start=1;
    if (pos==k)
    {
        for (i=0; i<=k-1; ++i)
        {
            fprintf(iesire,"%d ",v[i]);
        }
        fprintf(iesire,"\n");
    }
    else
    {
        if (pos>0)
        {
            start=v[pos-1]+1;
        }
        for (i=start; i<=n; ++i)
        {
            v[pos]=i;
            backtracking(pos+1);
        }
    }
}

int main()
{
    intrare=fopen("combinari.in","r");
    iesire=fopen("combinari.out","w");
    fscanf(intrare,"%d%d",&n,&k);
    backtracking(0);
}