c-cd cccc cccf cccs cccu ccdc ccdf ccds cced ccee ccfc ccfd ccff ccsd ccsf ccss ccuc ccus cd-e cdcs cdec cdef cdes cdfe cdfs cdss cec- cece cecs cedd cede cedu ceec cees cef- cefc cesc cese cess cfcf cfcs cfds cfse cscc cscd csce cscf cscs csec csee csfc cssd csse csuf csus cucc cuce cude cuds cued cues cufc cuff cusd cuss cusu dccc dccs dccu dcds dcfc dcfs dcsc dcss dddd ddes ddss dec- decc decd dece decs dedd dede dedu deed deef dees defe deff defs des- desc dese dess desu deue deus dfcc dfcs dfcu dfds dscc dscs dsfc dssc duce ducs dudd dude duds dudu dues dufc duff dufu duse eccc ecce ecdc ecdf eced ecef eces ecfc ecfs ecsc ecse ecss ecsu ecus eddc edde edds ede- edes edfu edss educ eecs eede eedu eeee eees eefe eese efes effs esce escs escu esds esdu esee eses esfs esse essu esuf esus eucd eude eufc euse fccf fcds fces fcsc fece fede feds feed fees fefc fefe feff fese fess feud feus ffcc ffee ffff ffss fscc fsec fssc fssf fuc- fudd fude fufc fuff fufu fusc fusd fuse fuss fusu sccc scce sccs scdc scdf scds scec scee scfc scfe scsc scsd scsu scud sdcc sddc sdds sdef sdes sdfc sdsc sdsf sdss sdsu se-c se-d se-e se-f se-s se-u sec- secc secd sece secs secu sede seds seec seed seef sees seeu seff sesc sese sess sfcc sfcs sfdc sffc sfss sfsu sscc ssce sscs ssdc ssdd ssdf ssec ssee sses ssfc sssc sssf ssss suc- succ sucs sudd sude suds sued suee sues sueu suf- sufc suff sufs sufu sus- susd suse suss susu suus ucdc ucdd uces ucsc ucsd ucsf ucsu udds udsd uess ufcu uffe uscc usce uscf uscs usdc usde usdf usds used usee usef uses usfc usfs ussc usse ussf usss ussu usus uuuu