5	prion	5	porin
5	orpin	4	porn
4	pirn	4	pion
4	nori	4	noir
4	iron	4	inro
3	rip	3	rin
3	pro	3	poi
3	pir	3	pin
3	nor	3	nip
3	ion	2	po
2	pi	2	or
2	op	2	on
2	oi	2	no
2	io	2	in