w = int(input())
l = int(input())
h = int(input())

all_space = w * l * h
boxes = input()

while not boxes == "Done":
    all_space -= int(boxes)

    if all_space <= 0:
        print(f"No more free space! You need {abs(all_space)} Cubic meters more.")
        break
    boxes = input()
if boxes == "Done":
    print(f"{all_space} Cubic meters left.")