digraph test {
	rankdir=LR
	node [shape=circle]
	root [label="", shape=point]
	root -> r [label=⅓]
	root -> f [label=⅔]
	r [label=r]
	r -> rr [label=⅓]
	rr [label=r]
	rr -> rrr [label=⅓]
	rrr [label=r]
	rrr -> rrrr [label=⅓]
	rrrr [label=r]
	rr -> rrf [label=⅔]
	rrf [label=f]
	rrf -> rrfr [label=⅓]
	rrfr [label=r]
	rrf -> rrff [label=⅔]
	rrff [label=f]
	rrr -> rrrf [label=⅔]
	rrrf [label=f]
	r -> rf [label=⅔]
	rf [label=f]
	rf -> rfr [label=⅓]
	rfr [label=r]
	rfr -> rfrr [label=⅓]
	rfrr [label=r]
	rfr -> rfrf [label=⅔]
	rfrf [label=f]
	rf -> rff [label=⅔]
	rff [label=f]
	rff -> rffr [label=⅓]
	rffr [label=r]
	rff -> rfff [label=⅔]
	rfff [label=f]
	f [label=f]
	f -> fr [label=⅓]
	fr [label=r]
	fr -> frr [label=⅓]
	frr [label=r]
	frr -> frrr [label=⅓]
	frrr [label=r]
	frr -> frrf [label=⅔]
	frrf [label=f]
	fr -> frf [label=⅔]
	frf [label=f]
	frf -> frfr [label=⅓]
	frfr [label=r]
	frf -> frff [label=⅔]
	frff [label=f]
	f -> ff [label=⅔]
	ff [label=f]
	ff -> ffr [label=⅓]
	ffr [label=r]
	ffr -> ffrr [label=⅓]
	ffrr [label=r]
	ffr -> ffrf [label=⅔]
	ffrf [label=f]
	ff -> fff [label=⅔]
	fff [label=f]
	fff -> fffr [label=⅓]
	fffr [label=r]
	fff -> ffff [label=⅔]
	ffff [label=f]
}