#include<cstdio>
using namespace std;
int n,k,comb[20],vc[20];
void backtracking(int nivel){
    int i;
    if(nivel==k+1){
        for(i=1;i<=k;i++){
            printf("%d",comb[i]);
            if(i==k)
                printf("\n");
            else
                printf(" ");
        }
        return;
    }
    for(i=comb[nivel-1]+1;i<=n;i++)
        if(vc[i]==0){
            vc[i]=1;
            comb[nivel]=i;
            backtracking(nivel+1);
            vc[i]=0;
        }
}
int main(){
    freopen("combinari.in","r",stdin);
    freopen("combinari.out","w",stdout);
    scanf("%d%d",&n,&k);
    backtracking(1);
    return 0;
}