input = """\
forward 5
down 5
forward 8
up 3
down 8
forward 2"""
# part 2
with open("2021/day02/data.txt") as inputfh:
data = inputfh.read()
input = data
depth = 0
hor = 0
aim = 0
for l in input.splitlines():
dir, amount = l.split(" ")
amount = int(amount)
if dir == "forward":
hor += amount
depth = depth + aim * amount
elif dir == "down":
# depth += amount
aim += amount
else:
# depth -= amount
aim -= amount
print(depth * hor)
return_value = depth * hor