5	tacks	5	stack
4	task	4	tack
4	skat	4	scat
4	sack	4	kats
4	cats	4	cast
4	cask	4	acts
3	tsk	3	tas
3	ska	3	sat
3	sac	3	kat
3	kas	3	cat
3	ats	3	ask
3	aks	3	act
3	ack	2	ta
2	ka	2	at
2	as