spea speb spec spee spel spes spia spib spic spie spip spis spla splc sple splp spls spps spsa spse spsp spss spue spui spus ssaa ssab ssac ssap ssas ssau ssca sscc ssce ssci sscp sscs ssec ssee ssep sses ssis ssla sslc ssle sslp sspa sspc sspe sspl ssps sssa sssb sssc sssi ssss suas sub- suba subb subi subl subs suc- succ suci sucs suee suel sues sueu suie suis sul- sula sulc sule suli sull sulp sulu sup- supa supe supp sups sus- susa suse susi susp suss susu suus u-ie uabc uaca uaes uasa uasp uaua ubac ubal ubba ubbe ubbi ubic ubii ubis ubla uble ubli ubls ubpc ucai ucal ucas ucbc ucca ucci uccp ucea ucel uces ucil ucla ucpa ucpb ucsa ucsb ucsc ucsu ucua ueba uele ueli uell uepi uess uica uies uile uipi uise ulaa ulae ulai ulas ulbc ulcc ulea uleb ulee ules ulic ulie ulla ulle ulli ulsa ulua ulul ulus upac upal upas upbe upca upci upcs upic upie upis upla uplb uppa uppc uppe uppp uppu upsa upsc upse upsi upup us-a usaa usac usal usap usas usba usbc usbe usbl usbs usca uscc usce uscs usea usee usel uses usia usie usip usis usle uslp uslu uspa uspc uspp usps ussa ussb ussc usse usss ussu usua usui usul usus uucp uulu uusi uuuu