spax spea spee spek sper spes spex spke spkr spps spqr sprs spsa spse spsp spss spue spur spus sqep sras sres srps srpx srsp ssaa ssap ssas ssau ssee ssep sses ssex sspa sspe ssps sspx ssra ssrs sssa ssss suar suas suee suer sues sueu suka suke suks suku sup- supa supe supp supr sups suqs sur- sura sure surp surr surs suru sus- susa suse susk susp suss susu suus sux- suxe u-rp uaes uars uaru uasa uasp uaua uers uess ukek ukes ukeu ukpa ukps ukra uksa ukup ukur upar upas uppa uppe uppp uppu upra upsa upse upup uqar urap uras urau ure- urea ures urex urka urke urra urre ursa urse urss ursu uruk urup uruq urur urus us-a us-k usaa usak usap usar usas usea usee user uses uska uske uspa uspp usps usra ussa usse ussr usss ussu usua usus uuuu uxue uxus xaar xara xare xeer xeka xer- xera xers xeus xexe xkes xpak xpax xper xpra xrep xsup xura xurs xuxa xuxu xxxx