6	burgoo	5	buroo
5	bourg	4	grub
4	gobo	4	burg
4	broo	4	boor
3	urb	3	rug
3	rub	3	roo
3	rob	3	our
3	orb	3	gur
3	gub	3	gor
3	goo	3	gob
3	bur	3	bug
3	bro	3	boo
3	bog	2	ou
2	or	2	oo
2	go	2	bo