sple splp splr spls spps sprs spse spsp spss spue spur spus srcc srec sres srpc srps srsp sscc ssce sscp sscs ssec ssee ssep sses sslc ssle sslp sspc sspe sspl ssps ssrc ssrl ssrs sssc ssss suc- succ suck sucr sucs suee suel suer sues sueu suke suks suku sul- sulc sule sulk sull sulp sulu sup- supe supp supr sups sur- surc sure surp surr surs suru sus- suse susk susp suss susu suus u-rp uccp ucel uces ucrc ucsc ucsu uele uell uers uess ukcc ukek ukes ukeu ukps ukrc uksc ukup ukur ulcc ulee ulek ules ulle ullr uluk ulul ulus upcs uppc uppe uppp uppu upsc upse upup ure- ures urke urle urls urre urse urss ursu uruk urup urur urus us-k uscc usce uscs usee usel user uses uske usle uslp uslu uspc uspp usps ussc usse ussr usss ussu usul usus uucp uulu uuuu