Cake

width = int(input())
lenth = int(input())
cake = width * lenth
pieces = 0
pieces_taken = ""

while pieces < cake:
  pieces_taken = input()
  if pieces_taken == "STOP":
    if pieces < cake:
      print(f"{cake - pieces} pieces are left.")
      break
    else:
      print(f"No more cake left! You need {abs(cake - pieces)} pieces more.")
      break
  pieces += int(pieces_taken)
  if pieces >= cake:
    print(f"No more cake left! You need {abs(cake - pieces)} pieces more.")
    break