spos spps spri spro sprs spso spsp spss spui spur spus srcc sris sros srpc srps srsp sscc ssci sscp sscs ssis sslc sslp ssoc ssop sspc sspl sspo ssps ssrc ssri ssrl ssrs sssc sssi ssss suc- succ suci sucr sucs suio suir suis sul- sulc suli sull sulo sulp sulu suor suos sup- supo supp supr sups sur- surc suri suro surp surr surs suru sus- susi suso susp suss susu suus u-rp ucci uccp ucil ucio ucos ucrc ucsc ucsu uipi uirr ulcc ulco ulic ulli ullo ullr ulo- uloc ulos ulul ulus uocc uolc uor- upci upcs upic upis uplo upor upos uppc uppp uppu upri upsc upsi upup urci uric uris uriu urls uro- urol uroo urpo urri ursi urso urss ursu urup urur urus uscc usco uscs usip usis uslp uslu usoc usoi usos uspc uspo uspp usps ussc ussr usss ussu usui usul usus uucp uulu uuoc uuri uusi uuuu