def parse(fdl):
	files = open(fdl)
	command = {}
	rule = []
	for line in files:
		line = line.strip()
		splitted = line.split()
		if splitted == 'start':
			start = splitted[1:]
		elif splitted[0] == 'rule':
			rule.append((splitted[1],splitted[3:]))
		elif splitted[0] =='cmd':
			cmd = (splitted[2],splitted[3:])
			command[splitted[1]] = cmd
		elif splitted[0] == 'length':
			length = int(splitted[1])
		elif splitted[0] == 'depth':
			depth = int(splitted[1])
	return start,rule,commands,length,depth

parse(fern)