6	brills	5	rills
5	brill	5	birls
5	bills	4	sill
4	rill	4	ribs
4	libs	4	ills
4	bris	4	birl
4	bill	3	sri
3	sir	3	sib
3	rib	3	lis
3	lib	3	ill
3	bis	2	si
2	li	2	is
2	bi