Sorry if have got it wrong... Yeah, that is why I said VERY HARD instead of IMPOSSIBLE...
BTW, are you a master in Mcgill? If that is the case, your success is really impresive! I knew something about their graduate econ courses. Their training is kind of inadequate, IMO. Correct me if I were wrong. Of course, it would be another story if you had done your undergraduate there...
Anyway, congratulation on your great achievement!