7	boxroom	5	broom
5	bromo	4	room
4	moor	4	moob
4	mobo	4	broo
4	boor	4	boom
3	roo	3	rom
3	rob	3	oxo
3	orb	3	oom
3	mor	3	moo
3	mob	3	bro
3	box	3	boo
2	ox	2	or
2	oo	2	om
2	mo	2	bo