6	boffin	5	biffo
4	niff	4	info
4	foin	4	fino
4	boff	4	biff
3	off	3	obi
3	nob	3	nib
3	ion	3	iff
3	fon	3	fob
3	fin	3	fib
3	bon	3	bio
3	bin	3	bff
2	on	2	oi
2	of	2	no
2	io	2	in
2	if	2	fi
2	bo	2	bi