7	tubfuls	6	tubful
5	flubs	4	ulus
4	tubs	4	sulu
4	stub	4	slub
4	lust	4	fubs
4	flus	4	flub
4	buts	4	bust
3	uts	3	ulu
3	ult	3	tub
3	sub	3	fub
3	flu	3	but
3	bus	2	ut
2	us	2	fu