isba isbe isca iscc isci iscr iscs iscu isea iseb isec isee iser ises isia isic isie isis isra isri issa issc isse issi issr isss issu isua isus iucc iuce iuiu iura iuse iuss raab raas raba rabb rabe rabi rabs rabu rac- raca racc race raci racs racu raec raer raes raia raic raie raii rair rais raiu rara rarb rare rari rars rasa rasc rase rasi rass rasu raua raub rauc raue raus rbbb rbbr rbbs rbis rbss rcac rcas rcbc rccb rccc rccs rcic rcis rcsa rcsc rcsi rcss rea- reac reae rear reas reau reba rebb rebe rebs rebu reca recc rece reci recr recs recu reeb rees reia reii reir reis reiu rera rere reri rers reru resa rese resi ress reue reus reuu riaa riab riai rias riau rib- riba ribe ribs ribu rica ricc rice rics rier ries rieu riia riis rire riri rirs risa risc rise risi riss risu riue rius rras rrrr rsaa rsai rsbi rscc rscs rsee rsis rsre rssa rsua ruas ruba rubb rube rubi rubs rubu ruca ruce ruci ruer rues ruis rura rurc rure ruri rurs ruru rusa ruse rusi russ rusu s-ib s-ic s-ii sa-c saab saac saae saar saas saba sabb sabc sabe sabi sabr sabs sabu saca sacc sace saci sacr sacs sacu saeb saer saes saia saic saie sair sais sara sarc sare sari sarr sars saru sasa sasc sase sasi sass saua sauc saue saur saus sbaa sbac sbai sbar sbas sbbs sbca sbcc sbcs sber sbia sbic sbsa sbse sbsi sbus scaa scab scac scai scar scas scba scbi sccc scce sccs scea scec scee scer sci- scia scic scie scir scis scr- scra scrc scre scri scrs scsa scsc scsi scsr scsu scua scub scur se-c se-e se-i se-s se-u seaa seab seac sear seas seau seba sebe sebi sebs sec- seca secc sece secr secs secu seea seeb seec seer sees seeu seia seie seii seir seis seiu sera serb serc sere seri serr sers seru sesa sesc sese sesi sess seui seur siaa siab siac siae siai sias siau siba sibc sibe sibi sibs sibu sica sicc sice sici sics sicu siec sier sies sira sirc sire siri sirr sirs siru sisa sisc sise sisi siss sisu siue siui sius sras srbc srcc sreb srec sres srib sris srub ssaa ssab ssac ssas ssau ssbr ssca sscc ssce ssci sscs ssec ssee sses ssis ssra ssrc ssri ssrs sssa sssb sssc sssi ssss suar suas sub- suba subb subi subs suc- succ suci sucr sucs suee suer sues sueu suie suir suis sur- sura surc sure suri surr surs suru sus- susa suse susi suss susu suus u-ie uabc uaca uaes uair uarc uars uaru uasa uaua ubac ubar ubba ubbe ubbi uber ubic ubii ubir ubis ubra ucai ucar ucas ucbc ucca ucci ucea uces ucrc ucsa ucsb ucsc ucsu ucua ueba ueir uers uess uica uies uira uirr uise urac urai uras urau urba urbe urbi urbs urca urci ure- urea ures uria urib uric urie uris uriu urra urre urri ursa urse ursi urss ursu urur urus us-a usaa usac usar usas usba usbc usbe usbr usbs usca uscc usce uscs usea usee user uses usia usie usis usra ussa ussb ussc usse ussr usss ussu usua usui usus uuri uusi uuuu