5	robin	4	nori
4	noir	4	iron
4	inro	4	brio
4	brin	4	born
4	biro	3	rob
3	rin	3	rib
3	orb	3	obi
3	nor	3	nob
3	nib	3	ion
3	bro	3	bon
3	bio	3	bin
2	or	2	on
2	oi	2	no
2	io	2	in
2	bo	2	bi