#include<cstdio>
using namespace std;
int n,m;
int Sum,Ans;
int c[11];
void dfs1(int,int),dfs2(int,int);
int main()
{
	freopen("dataa.in","r",stdin);
	freopen("dataa.out","w",stdout);
	scanf("%d%d",&n,&m);
	c[0]=1;
	dfs1(n,m);
	printf("%d\n",Ans);
	dfs2(n,m);
	return 0;
}
void dfs1(int x,int y)
{
	if(y==1)
	{
		Ans++;
		return;
	}
	for(int i=c[m-y];i<=x/y;i++)
	{
		c[m-y+1]=i;
		dfs1(x-i,y-1);
	}
}
void dfs2(int x,int y)
{
	if(y==1)
	{
		for(int i=1;i<=m-1;i++) printf("%d ",c[i]);
		printf("%d\n",x);
		return;
	}
	for(int i=c[m-y];i<=x/y;i++)
	{
		c[m-y+1]=i;
		dfs2(x-i,y-1);
	}
}