#include <stdio.h>

void back(int s[100],int n,int k,int l,FILE *g)
{
    int i;
    if(l==k)
    {
        for(i=1;i<=k;i++)
            fprintf(g,"%d ",s[i]);
        fprintf(g,"\n");
    }
    else
        for(i=s[l]+1;i<=n;i++)
        {
            s[l+1]=i;
            back(s,n,k,l+1,g);
        }
}


int main(void)
{
  FILE *f,*g;
  int i,n,k,s[100],l=0;
  f=fopen("combinari.in","r");
  g=fopen("combinari.out","w");
  fscanf(f,"%d %d",&n,&k);
  for(i=0;i<=n;i++)
    s[i]=0;
  back(s,n,k,l,g);
  fclose(f); fclose(g);
  return 0;
}