import random
def og_monty_trial(N):
car_door = random.randint(0, N-1)
player_select = random.randint(0, N-1)
monty_doors = set(range(N))
monty_doors.remove(car_door) # monty does not open the door with the car, and he knows which it is
try:
monty_doors.remove(player_select) # monty does not open the player's door
except KeyError: # player selected the car door; monty randomly chooses a goat door to not open