repe repp repr reps repu rera rere rers reru resa rese resp ress reue reuf reup reus reuu rfae rfef rffc rpca rpcs rpfc rpps rras rrfc rrrr rrsp rsaa rsaf rscc rscs rsee rsfc rsps rsre rssa rsua ruas ruca ruce ruer rues rufa rufc rufe ruff rupa rupe rupp rura rurc rure rurp rurs ruru rusa ruse russ rusu sa-c saac saae saaf saap saar saas saca sacc sace sacr sacs sacu saer saes safa safc safe saff safr safu sapa sape sapp saps sara sarc sare sarf sarp sarr sars saru sasa sasc sase sasf sass saua sauc saue sauf saup saur saus scaa scac scaf scap scar scas sccc scce sccp sccs scea scec scee scep scer scfa scfc scfe scpa scpe scps scr- scra scrc scre scrs scsa scsc scsr scsu scua scup scur se-c se-e se-f se-s se-u seaa seac seaf seap sear seas seau sec- seca secc sece secr secs secu seea seec seef seep seer sees seeu sefa seff sepa sepe sepp sepr seps sepu sera serc sere serf serp serr sers seru sesa sesc sese sess seur sfar sfas sfca sfcc sfcs sfer sffc sfpa sfpc sfra sfrc sfss sfsu sp-a spac spae spap spar spas spau spca spcc spcs spea spec spee spef sper spes spfc spfs sppf spps sprs spsa spse spsp spss spue spur spus sraf sras srcc srec sres srfc srpc srps srsp ssaa ssac ssap ssas ssau ssca sscc ssce sscp sscs ssec ssee ssep sses ssfc ssfp sspa sspc sspe sspf ssps ssra ssrc ssrs sssa sssc sssf ssss suar suas suc- succ sucr sucs suee suer sues sueu suf- sufa sufc suff sufr sufs sufu sup- supa supe supp supr sups sur- sura surc sure surf surp surr surs suru sus- susa suse susp suss susu suus u-rp uaca uaes uafa uarc uars uaru uasa uasp uaua ucar ucas ucca uccp ucea uces ucfa ucpa ucrc ucsa ucsc ucsf ucsu ucua uefa uers uess ufcu ufer uffa uffe ufra upac upar upas upca upcs uppa uppc uppe uppp uppu upra upsa upsc upse upup urac urap uras urau urca ure- urea ures urfa urfe urff urra urre ursa urse urss ursu urup urur urus us-a usaa usac usaf usap usar usas usca uscc usce uscf uscs usea usee usef user uses usfa usfc usfs uspa uspc uspp usps usra ussa ussc usse ussf ussr usss ussu usua usus uucp uuuu