#define filer() freopen("in.txt","r",stdin)
#define filew() freopen("in.txt","w",stdout)
#define SET(a, x) memset((a), (x), sizeof(a))
#define i64 long long
#include<iostream>
#include<stdio.h>
#include<string.h>
#include<math.h>
#include<algorithm>
#include<queue>
#include<stack>
#include<vector>
#include <map>
#define INF 1<<29
#include<time.h>
#include<stdlib.h>

using namespace std;



int main()
{
    filew();
    int T,cas=0;
    printf("1000\n");
    for(int i=0;i<1000;i++)
    {
        printf("\n");
        unsigned long int d,guess;
        srand((unsigned int)(time(NULL)*time(NULL)));
        d=rand()%40000;
        printf("%d\n",d);
        for(i=0;i<d;i++)
        {
            unsigned long int x,y;
            srand((unsigned int)(time(NULL)*time(NULL)));
            x=rand()%10000000;
            srand((unsigned int)(time(NULL)*time(NULL)));
            y=rand()%(10000000-x);
            y+=x;
            printf("%d %d\n",x,y);
        }
    }
    return 0;
}