ship_width = float(input())
ship_length = float(input())
ship_height = float(input())
average_astronaut_height = float(input())

ship_volume = ship_height*ship_length*ship_width
room_volume = (average_astronaut_height + 0.40) * 2 * 2

number_of_astronauts = round(ship_volume / room_volume)

if number_of_astronauts < 3:
    print("The spacecraft is too small.")
elif number_of_astronauts > 10:
    print("The spacecraft is too big.")
else:
    print(f'The spacecraft holds {number_of_astronauts} astronauts.')