7	unburnt	5	burnt
5	brunt	4	turn
4	runt	4	nunu
4	burn	4	bunt
4	bunn	4	brut
3	urn	3	urb
3	tur	3	tun
3	tub	3	rut
3	run	3	rub
3	nut	3	nun
3	nub	3	but
3	bur	3	bun
2	ut	2	un
2	nu