#include <bits/stdc++.h>

using namespace std;

int main()
{
    srand(time(NULL));
    freopen(".2.in","w", stdout);
    cout<<100<<endl;
    for(int i = 0 ; i < 100 ; i++ )
    {
        int x = rand()%90 + 11;
        int y = rand()%90 + 11;
        cout<<x<<" "<<y<<endl;
    }
}