6	drills	5	rills
5	drill	5	dirls
5	dills	4	slid
4	sill	4	sild
4	rill	4	rids
4	lids	4	ills
4	dirl	4	dill
3	sri	3	sir
3	rid	3	lsd
3	lis	3	lid
3	ill	3	ids
3	dis	2	si
2	li	2	is
2	id