#include<iostream>
#include<cstdio>
using namespace std;
const int MX=105;
const int MZ=1000010;

int L, R, S, T;
int t[MZ][2], siz;
int rt[MX], id[MX];
int e[MX][MX][2], cnt;
int read()
{
    int r=0, f=1; char ch=getchar();
    while(ch<'0'||ch>'9') {if(ch=='-') f=-1; ch=getchar();}
    while(ch>='0'&&ch<='9') {r=r*10+ch-'0'; ch=getchar();}
    return r*f;
}
int dig(int x)
{
    int ans=0;
    while(x) {x>>=1; ans++;}
    return ans;
}
int lb(int x) {return x&(-x);}
int get(int x)
{
    int now=lb(x);
    while(x+now-1>R&&now) now>>=1;
    return now; 
}
void fulink(int p, int v, int top)
{
    for(int i=v;i>=1;i--)
    {
        if(!id[i]) id[i]=++cnt;
        if(i==v) e[p][id[i]][top]=1;
        else
        {
            e[p][id[i]][1]=1;
            e[p][id[i]][0]=1;                
        }
        if(id[i]!=cnt) break;
        p=cnt;
    }
}
void ae(int x, int v)
{
    // cout << "x=" << x << ", v=" << v << ", cnt=" << cnt << '\n';
    int len=dig(x);
    for(int i=len,pre=S;i>=1;i--)
    {
        if(i==v)
        {
            fulink(pre,v,(x>>(i-1))&1);
            break;
        }
        else
        {
            int d=((x>>(i-1))&1), now=T;
            if(!t[pre][d])
            {
                if(i!=1) now=++cnt;
                t[pre][d]=now;
                e[pre][t[pre][d]][d]=1;
            }
            pre=t[pre][d];
        }
    }
}
int main()
{
    // freopen("testdata.in","r",stdin);
    L=read(); R=read();
    S=1; T=2; cnt=2; id[1]=T;
    for(int i=L;i<=R;i+=get(i))
    {
        ae(i,dig(get(i)));
    }
    cout << cnt << '\n';
    for(int i=1;i<=cnt;i++)
    {
        int num=0;
        for(int j=1;j<=cnt;j++)
            num+=e[i][j][0]+e[i][j][1];
        cout << num << " ";
        for(int j=1;j<=cnt;j++)
        {
            if(e[i][j][0]) cout << j << " 0 ";
            if(e[i][j][1]) cout << j << " 1 ";
        }
        cout << '\n';
    }
    return (0-0);
}