#include <bits/stdc++.h>
#define int long long
#define lson k<<1
#define rson (k<<1)|1
#define debug cout<<666<<endl;
using namespace std;
const int N=500+5;
vector<pair<int,int>>v[N];
int tot=30;
int lowbit(int x){
	return x&(-x);
}
int lcp[N];
int syy[N];
void getlcp(int x,int y,int id){
	int ans=0;
	int ned=1;
	int nn=0;
	while(x!=y){
		x=(x>>1);
		y=(y>>1);
		ned*=2;
		nn++;
	}
	x=x*ned;
	lcp[id]=x;
	syy[id]=nn;
	return ;
}
int tr[N][3],cnt=1;
void add(int x,int sy){
	int p=200;
	for(int i=1;i<=sy;i++){
		x=x/2;
	}
	int now=log2(x);
	while(now>=1){
		int tmp=((x>>now)&1);
		int nex=0;
		for(auto it:v[p]){
			if(it.second==tmp&&it.first>21){
				nex=1;
				p=it.first;
				now--;
				break;
			}
		}
		if(nex==0){
			v[p].push_back({tot,tmp});
			p=tot;
			tot++;
			now--;
		}
	}
    if(p<21)return ;
	if(x%2==1){
		v[p].push_back({sy,1});
	}
	else {
		v[p].push_back({sy,0});
	}
	return ;
}
set<int>st;
void dfs(int x){
	st.insert(x);
    // cout<<x<<" ";
	for(auto it:v[x]){
		dfs(it.first); 
	}
}
void vision()
{
	int x,y;
	for(int i=20;i>=1;i--){
		v[i].push_back({i-1,0});
		v[i].push_back({i-1,1});
	}
	cin>>x>>y;
	vector<pair<int,int>>vv;
	int l=x;
	while(l<=y){
		int add=lowbit(l)-1;
		while(l+add>y){
			add/=2;
		}
		int r=l+add;
		vv.push_back({l,r});
		l=r+1;
	}
	int num=1;
	for(auto it:vv){
		// cout<<it.first<<":"<<it.second<<" ";
		getlcp(it.first,it.second,num++);
	}
	// cout<<num<<" ";
	num=1;
	for(auto it:vv){
		add(lcp[num],syy[num]);
		// cout<<syy[num]<<" ";
		num++;
	}
    // cout<<"\n";
    // for(auto it:v[2]){
    //     cout<<it.first<<" "<<it.second<<" ";
    // }
    // cout<<"\n";
    // return ;
	dfs(200);
	map<int,int>mp;
	int hh=0;
	for(auto it:st){
		hh++;
		mp[it]=hh;
	}
	cout<<hh<<"\n";
	for(auto it:st){
		cout<<v[it].size()<<" ";
		for(auto iit:v[it]){
			cout<<mp[iit.first]<<" "<<iit.second<<" ";
		}
		cout<<"\n";
	}
	return ;
}
signed main()
{
	int t=1;
	// cin>>t;
	while(t--){
		vision();
	}
	return 0;
}