7	develed	6	leveed
6	delved	5	levee
5	devel	5	delve
5	deled	4	veld
4	leve	4	lede
4	dele	4	deed
3	vee	3	lev
3	lee	3	led
3	eve	3	eld
3	eel	3	dev
3	del	3	dee
2	el	2	ee
2	ed	2	de