Proto-Uralic

For now, this is a table of medial consonant clusters.

Words included from appendix from this: http://urn.fi/URN:NBN:fi-fe20071746 (see comments in table code)

2nd → 1st ↓		p	t	č	k	s	ś	ð	ðʲ	w	j	l	r	m	n	ŋ		Notes		Frequency color code
N	m	mp	mt			ms	mś											mostly i-stems		single root
	n		nt	nč			nś													two roots
	ń						ńś											might not be distinct from *nś		3-4 roots
	ŋ		ŋt		ŋk	ŋs														5 roots
P	p	pp	pt			ps	pś	pð												~10 roots
	t				tk
	č				čk
	k		kt		kk	ks	kś
F	s				sk													both i-stems
	ś				śk													mostly i-stems + *wäśka
	ðʲ				ðʲk					ðʲw
(?)	x		xt	xč		xs	xś		xðʲ		xj	xl	xr	xm	xn			i-stems only
sV	w							wð			wj	wl				wŋ		after e ä a only
	j									jw				jm		jŋ		after ä a o only
L	l		lt		lk					lw	lj			lm		lŋ
	lʲ				lʲk
	r	rp	rt		rk					rw				rm				mostly back-harmonic