spop spor spos sppd spps sprd spri spro sprs spsd spso spsp spss spud spug spui spun spur spus srcc sris srni srnn srno sros srpc srps srsd srsp sscc ssci sscp sscs ssdc ssdd ssdp ssgs ssid ssin ssis ssns ssoc ssop sspc sspo ssps ssrc ssrg ssri ssrs sssc sssi ssss suc- succ suci sucr sucs sudd sudi sudo suds sug- sugg sugi sugo suid suig suin suio suir suis sun- sund sung suni sunn suno suns sunu suor suos sup- supo supp supr sups sur- surc surd surg suri surn suro surp surr surs suru sus- susd susi suso susp suss susu suus u-rp ucci uccp ucdc ucdd ucin ucio ucon ucos ucrc ucsc ucsd ucsu uddi udds udic udid udig udin udir udon udoo udop udos udpd udsd udun ugcc ugcg uggo uggs ugis ugni ugod ugos ugri ugro ugur uguu uipi uirr uisd uncc uncg unci unco uncp uncs undi undo unds ungo ungp ungu uni- unic unii unin unio unir unis unni unno unns unon unop unos unpc unps unro unrs uns- unsc unsg unso unus uocc uor- upci upcs updo upgo upic upin upis upnp upon upor upos uppc uppp uppu upri upsc upsi upup urci urds urdu urgi urgu uric urin uris uriu urni urns uro- uroo urpo urri ursi urso urss ursu urun urup urur urus uscc uscg usco uscs usdc usdo usdp usds usgo usgp usin usip usis usnc usno usnr usnu usoc usog usoi usos uspc uspo uspp usps ussc ussr usss ussu usui usun usus uucp uuni uuno uuoc uuri uusi uuuu