aim = 0
x = 0 # horizontal position
d = 0 # depth

with open('data', 'r') as fp:
    for line in fp:
        data = line.split()

	if(data[0] == 'forward'):
            x = x + int(data[1])
            d = d + aim * int(data[1])
        elif(data[0] == 'down'):
            aim = aim + int(data[1])
        else:
            aim = aim - int(data[1])

print "  x: ", x
print "  d: ", d
print "aim: ", aim
print "   : ", x * d