#include <iostream>

using namespace std;
int main()
{
    long long int  S,d, r, m;
    cin  >> S >> d >> r >>m ;
    if (S >= d )
        cout << "drona";
    else if (S >= r )
        cout << "robot";
    else if (S >= m )
        cout << "masina";
    else
        cout << "nimic";
    return 0;
}