7	thrifty	6	thrift
6	thirty	5	yirth
5	tirth	5	fritt
5	frith	5	firth
4	thir	4	rift
4	frit	3	try
3	tit	3	thy
3	rif	3	hit
3	fry	3	fit
3	fir	2	yi
2	ti	2	it
2	if	2	hi
2	fi