Below are eighteen cognate sets in four languages of the little-known Spiiktumi family.  Reconstruct the etymons (original forms) in proto-Spiiktumi for each of the cognate sets in the data, and identify the sound changes that have taken place in each daughter language.  NOTE:  The affricate [tš] is the equivalent of c with a caret -- the IPA symbol for the "ch" sound.

W	X	Y	Z	proto-Spiiktumi
pamut	panti	pamuti	pamut
sit	sido	šiðo	sid
denubo	dembo	denubo	denubo
leluk	leruge	leruge	lelug
sudan	sudano	suðano	sudan
unik	unga	uniga	unig
tšomus	tšomusi	tšomuši	šomus
lahuk	lahka	lauka	lahuk
banubin	bambini	banubini	banubi
lahuk	rahgo	raugo	lahug
hefum	hefmo	hefumo	hefum
sehubat	sehubda	šehubaða	sehubad
tehigem	tehgemo	teigemo	tehige
yunup	yumbi	yunubi	yunub
famagi	famgi	famagi	famagi
tšasinokom	tšasinkomo	tšašinokomo	šasinokom
suda	suda	suða	suda
kahihanom	kahkammo	kaihanomo	kahihanom