cccc cccf cccs cccu ccee ccfc ccff ccrc ccre ccrf ccrs ccsf ccss ccuc ccus cec- cece cecs ceec cees cef- cefc ceke cer- cerc cere cerf cers cesc cese cesr cess cfcf cfcs cffr cfre cfse ckck ckcs cker ckfr ckrc crcc crce crcr cre- crec cree cres creu crfc crfs crkc crss crue cruk crus cscc csce cscf cscr cscs csec csee cser csfc csfr csks csrc csrs csse cssr csuf csur csus cucc cuce cuck cuek cuer cues cufc cuff cuk- cuke cure curf curr curs cusk cuss cusu eccc ecce ecef eces ecfc ecfr ecfs ecks ecrc ecrf ecrr ecru ecsc ecse ecss ecsu ecus eecs eeee eees eefe eeke eeks eerc eers eese eesk efes effs efke ekek eker ekes ekfc ekur ercc erce erec erer eres erfc erfs erke erks errc erre errs erse eruc erur erus esce escr escs escu esee esek eser eses esfs eske esks esku esse essu esuf esus euer eufc eur- eurc eure euse f--k fccf fces fcsc fcuk fece feck feek feer fees fefc fefe feff feke ferc fere ferk ferr fers feru fese fess feus ffcc ffee ffff ffrr ffss frcc free fres frfc frsc frue fscc fsck fsec fssc fssf fuc- fuck fufc fuff fufu fuke fukk fuku fur- fure furr furs fusc fuse fusk fuss fusu kccc kcck kccr kccu kcec kcee kceu kcfc kckc kckf kckk kckr kcrc kcrr kcrs kcru kcsc kcse kcsf kcsr kcss kcsu kcue kcuf kcuk keck kecr keef keek keer kees kefc keff kefr kefs kekc keke keks keku ker- kerc kere kerf kerk kerr kers keru kesc kesk kesr kess keur keus kfcf kfcr kfcs kfer kfff kffk kfrc kfre kfrr kfrs kfru kfse kfsk kfsr kkck kkcr kkcs kkfr kkfs kkkk kkrc kkre kkrf kkrk kkrr kkrs kkse kksf kksr kkss kksu kkus kkuu krcc krce krcs krcu krec kree kref krek kres kreu krfc krfe krff krfs krkc krke krkk krkr krks krku krrc krre krrf krrk krrr krrs krsc krse krsf krsk krsr krss krsu kruc krue kruf kruk krur ksce ksck kscr kscs kscu ksec ksee ksek kser ksfc ksfe ksfr kske kskf kskk kskr ksks ksku ksrf ksrr ksrs ksse kssr ksss kssu ksue ksuu kucc kuce kucr kuek kues kueu kufc kuff kufr kuke kukk kuks kuku kure kurk kurr kurs kuru kusc kusf kusu kuuk kuur kuuu rccc rccs rcfc rcsc rcss recc rece reck recr recs recu reef reek rees refe reff refr refs refu reke reks rere rers reru rese ress reue reuf reuk reus reuu rfef rffc rkkf rkss rrfc rrrr rscc rscs rsee rsfc rsre ruce ruck ruer rues rufc rufe ruff ruke rukk ruku rurc rure rurs ruru ruse rusk russ rusu sccc scce sccs scec scee scer scfc scfe sck- scr- scrc scre scrs scsc scsr scsu scur se-c se-e se-f se-k se-s se-u sec- secc sece seck secr secs secu seec seef seek seer sees seeu seff seke sekk seku serc sere serf serk serr sers seru sesc sese sess seur sfcc sfcs sfer sffc sfrc sfss sfsu skee sker skes skfc skss skue skur srcc srec sres srfc sscc ssce sscs ssec ssee sses ssfc ssrc ssrs sssc sssf ssss suc- succ suck sucr sucs suee suer sues sueu suf- sufc suff sufr sufs sufu suke suks suku sur- surc sure surf surr surs suru sus- suse susk suss susu suus uces ucrc ucsc ucsf ucsu uers uess ufcu ufer uffe ufuk ukcc ukek ukes ukeu ukrc uksc ukur ure- ures urfe urff urke urre urse urss ursu uruk urur urus us-k uscc usce uscf uscs usee usef user uses usfc usfs uske ussc usse ussf ussr usss ussu usus uuuu