cccc cccs cccu ccee ccrc ccre ccrs ccss ccuc ccus cec- cece cecs ceec cees ceke cer- cerc cere cers cesc cese cesr cess ckck ckcs cker ckrc crcc crce crcr cre- crec cree cres creu crkc crss crue cruk crus cscc csce cscr cscs csec csee cser csks csrc csrs csse cssr csur csus cucc cuce cuck cuek cuer cues cuk- cuke cure curr curs cusk cuss cusu eccc ecce eces ecks ecrc ecrr ecru ecsc ecse ecss ecsu ecus eecs eeee eees eeke eeks eerc eers eese eesk ekek eker ekes ekur ercc erce erec erer eres erke erks errc erre errs erse eruc erur erus esce escr escs escu esee esek eser eses eske esks esku esse essu esus euer eur- eurc eure euse kccc kcck kccr kccu kcec kcee kceu kckc kckk kckr kcrc kcrr kcrs kcru kcsc kcse kcsr kcss kcsu kcue kcuk keck kecr keek keer kees kekc keke keks keku ker- kerc kere kerk kerr kers keru kesc kesk kesr kess keur keus kkck kkcr kkcs kkkk kkrc kkre kkrk kkrr kkrs kkse kksr kkss kksu kkus kkuu krcc krce krcs krcu krec kree krek kres kreu krkc krke krkk krkr krks krku krrc krre krrk krrr krrs krsc krse krsk krsr krss krsu kruc krue kruk krur ksce ksck kscr kscs kscu ksec ksee ksek kser kske kskk kskr ksks ksku ksrr ksrs ksse kssr ksss kssu ksue ksuu kucc kuce kucr kuek kues kueu kuke kukk kuks kuku kure kurk kurr kurs kuru kusc kusu kuuk kuur kuuu rccc rccs rcsc rcss recc rece reck recr recs recu reek rees reke reks rere rers reru rese ress reue reuk reus reuu rkss rrrr rscc rscs rsee rsre ruce ruck ruer rues ruke rukk ruku rurc rure rurs ruru ruse rusk russ rusu sccc scce sccs scec scee scer sck- scr- scrc scre scrs scsc scsr scsu scur se-c se-e se-k se-s se-u sec- secc sece seck secr secs secu seec seek seer sees seeu seke sekk seku serc sere serk serr sers seru sesc sese sess seur skee sker skes skss skue skur srcc srec sres sscc ssce sscs ssec ssee sses ssrc ssrs sssc ssss suc- succ suck sucr sucs suee suer sues sueu suke suks suku sur- surc sure surr surs suru sus- suse susk suss susu suus uces ucrc ucsc ucsu uers uess ukcc ukek ukes ukeu ukrc uksc ukur ure- ures urke urre urse urss ursu uruk urur urus us-k uscc usce uscs usee user uses uske ussc usse ussr usss ussu usus uuuu