cccc cccp cccs cccu ccee ccpe ccpp ccpr ccps ccrc ccre ccrp ccrs ccsp ccss ccuc ccup ccus cec- cece cecp cecs ceec cees ceke cepc cepe cepp cepr ceps cer- cerc cere cerp cers cesc cese cesp cesr cess ckck ckcs cker ckpc ckpr ckrc cpce cpcs cpcu cpep cper cpps cpre cprs cpsc cpsk cpsr cpsu cpus crcc crce crcr cre- crec cree crep cres creu crkc crkp crpc crps crsp crss crue cruk crup crus cscc csce cscr cscs csec csee csep cser csks cspc cspe csps csrc csrs csse cssr csup csur csus cucc cuce cuck cuek cuer cues cuk- cuke cupe cupp cupr cups cure curr curs cusk cusp cuss cusu eccc ecce eces ecks ecpp ecrc ecrr ecru ecsc ecse ecsp ecss ecsu ecus eecs eeee eees eeke eeks eeps eerc eers eese eesk ekek eker ekes ekpe ekur epcc epec epee eper epes eppc eppp epps eprp eprs epsc epsp epss epus ercc erce ercp erec erer eres erke erks erpe erps errc erre errs erse eruc erur erus esce escr escs escu esee esek eser eses eske esks esku espc espe espp esps esse essp essu esus euer eur- eurc eure euse kccc kcck kccr kccu kcec kcee kcep kceu kckc kckk kckr kcpc kcpr kcps kcpu kcrc kcrp kcrr kcrs kcru kcsc kcse kcsp kcsr kcss kcsu kcue kcuk kcup keck kecr keek keep keer kees kekc keke keks keku kep- kepc kepe keps kepu ker- kerc kere kerk kerp kerr kers keru kesc kesk kesp kesr kess keup keur keus kkck kkcr kkcs kkkk kkpc kkpk kkps kkrc kkre kkrk kkrr kkrs kkse kksp kksr kkss kksu kkup kkus kkuu kpcc kpcr kpcs kpek kper kpke kpkk kpkr kppc kppk kppp kppr kprc kpre kprk kprp kprr kprs kpru kpsc kpsp kpsu kpur kpus krcc krce krcs krcu krec kree krek kres kreu krkc krke krkk krkr krks krku krpr krps krpu krrc krre krrk krrr krrs krsc krse krsk krsr krss krsu kruc krue kruk krup krur ksce ksck kscr kscs kscu ksec ksee ksek ksep kser kske kskk kskr ksks ksku kspc kspe kspk kspr ksps ksrp ksrr ksrs ksse kssr ksss kssu ksue ksup ksuu kucc kuce kucp kucr kuek kues kueu kuke kukk kuks kuku kupe kupr kups kupu kure kurk kurr kurs kuru kusc kusp kusu kuuk kuur kuuu pccc pcce pccs pcep pcer pcks pcpp pcps pcrc pcre pcse pece peck pecr pecs peec peek peep peer pees peke pekk pepe peps per- perc pere perk perp perr pers peru pese pess pesu peur pkcs ppcc ppcs pper pppp ppps pprc ppru ppss ppur prcc prcp prcs pre- prec pree prek prep pres preu prps prrs prsc prse prss prue prus pruu pscu psec pspp pspr psps psrk psrp pssc psse pu-e puce puck puer pueu puke puku pupe pups pupu pur- pure purp purr purs puru pusk puss puuc rccc rccs rcep rcps rcsc rcss recc rece reck recp recr recs recu reek reep rees reke reks repe repp repr reps repu rere rers reru rese resp ress reue reuk reup reus reuu rkss rpcs rpps rrrr rrsp rscc rscs rsee rspk rsps rsre ruce ruck ruer rues ruke rukk ruku rupe rupp rurc rure rurp rurs ruru ruse rusk russ rusu sccc scce sccp sccs scec scee scep scer sck- scpe scps scr- scrc scre scrs scsc scsr scsu scup scur se-c se-e se-k se-s se-u sec- secc sece seck secr secs secu seec seek seep seer sees seeu seke sekk seku sepe sepp sepr seps sepu serc sere serk serp serr sers seru sesc sese sess seur skee skep sker skes skpc skss skue skup skur spcc spcs spec spee spek sper spes spke spkr spps sprs spse spsp spss spue spur spus srcc srec sres srpc srps srsp sscc ssce sscp sscs ssec ssee ssep sses sspc sspe ssps ssrc ssrs sssc ssss suc- succ suck sucr sucs suee suer sues sueu suke suks suku sup- supe supp supr sups sur- surc sure surp surr surs suru sus- suse susk susp suss susu suus u-rp uccp uces ucrc ucsc ucsu uers uess ukcc ukek ukes ukeu ukps ukrc uksc ukup ukur upcs uppc uppe uppp uppu upsc upse upup ure- ures urke urre urse urss ursu uruk urup urur urus us-k uscc usce uscs usee user uses uske uspc uspp usps ussc usse ussr usss ussu usus uucp uuuu