-er -ic c-- ccc cce cci cck ccr cct ccu ce- cec cee cei cek cer cet ceu ci- cic cie cii cik cir cit ciu ckc cki ckt crc cre cri crk crr crt cru ctc cte cti ctk ctr ctt ctu cuc cue cui cuk cur cut cuu ec- ecc ece eci eck ecr ect ecu eec eee eek eer eet eic eie eii eik eir eit eiu ekc eke eki ekr ekt eku erc ere eri erk err ert eru etc ete eti etk etr ett etu eu- euc eue eui eur eut icc ice ici ick icr ict icu ie- iec iee iei iek ier iet iic iie iii iir iit iiu ikc ike iki ikk ikr ikt iku ir- irc ire iri irk irr irt iru itc ite iti itk itt itu iu- iuc iue iui iur iut k-t kcc kce kci kck kcr kct kcu ke- kec kee kei kek ker ket kic kie kii kik kir kit kiu kkc kke kki kkk kkr kkt kku krc kri krk krr krt kru ktc kte ktk ktr ktt ktu kuc kue kui kuk kur kut kuu rcc rce rci rcr rct rcu re- rec ree rei rek rer ret reu ric rie rii rik rir rit rkc rke rkk rkt rku rrc rri rrk rrr rrt rru rtc rte rti rtk rtr rtt rtu ruc rue rui ruk rur rut ruu tcc tce tci tck tcr tct tcu te- tec tee tei tek ter tet teu tic tie tii tik tir tit tiu tkc tke tkk tkr tkt trc tre tri trk trr trt tru ttc tte tti ttk ttr ttt ttu tuc tue tui tuk tur tut tuu ucc uce uci uck ucr uct ucu uec uee uei uer uet uic uie uii uir uit uiu ukc uke uki ukk ukr uku ur- urc ure uri urk urr urt uru utc ute uti utk utr utt utu uuc uue uur uut uuu

cccc ccci cccu ccee ccic ccii ccir ccrc ccre ccri ccrt cctc cctt ccuc ccut cec- cece ceci cect ceec ceke cer- cerc cere ceri cert cet- cete ceti ceui cicc cici cicr cict cicu ciee cier ciii ciit cikr circ cire ciri cirk cirr cirt cite citi citt citu ciuc ckck cker ckrc crcc crce crcr cre- crec cree crei cret creu cric crie crik crit criu crkc crrt crtc crue cruk crut ctec ctic ctrc cucc cuce cuci cuck cuek cuer cui- cuir cuit cuk- cuke cure curi curr curt cut- cutc cute cutt eccc ecce ecci ecct ecit ecrc ecri ecrr ecru ect- ectc eeee eeke eerc eetc eete eetu eick eiec eiei eier eike eiki eire eitc eiti eitr ekek eker eket ekki ekur ercc erce erec erei erer eret eric erie erik erit eriu erke erki errc erre ertu eruc erur etcc etec etee eter etic etik etre ette etti ettu etui euer eur- eurc eure eurt iccc icci iccr icct iccu icec icee icer icet icke icrc icre icrr icrt icru icue iecc ieet ieie iere ieri iett iiie iiii iiit iirc iitr iitt iiuc ikee iker ikki ikri ikue ircc ircu iree irer iri- iric irie irki irrc irre irri irte irti itec itek iter itet itic itie itri itur iucc iuce iuiu k-ci kccc kcci kcck kccr kcct kccu kcec kcee kcei kcet kceu kcic kcie kcii kcir kcit kciu kckc kckk kckr kcrc kcri kcrr kcrt kcru kctc kcte kcti kctu kcue kcui kcuk keck kecr keek keer keet keii keik keir kekc keke keki keku ker- kerc kere keri kerk kerr kert keru ket- ketc kete keti ketk ketr kett ketu keur kicc kice kick kicr kict kier kieu kiic kiii kiik kiit kiiu kikc kiki kikk kikr kikt kiku kirc kiri kirk kirr kirt kiru kitc kite kiti kitr kitt kitu kiur kiuu kkci kkck kkcr kkct kkic kkik kkit kkkk kkrc kkre kkrk kkrr kkrt kktc kktk kktu kkut kkuu krcc krce krci krcu krec kree krei krek kret kreu krik krit krkc krke krki krkk krkr krku krrc krre krri krrk krrr krrt krtc krti krtk krtr kruc krue krui kruk krur ktcc ktce ktck ktcr ktec ktee ktek ktic ktie ktik ktkc ktke ktkk ktkr ktkt ktku ktrc ktre ktri ktrk ktrr ktrt ktru kttc ktti kttk kttr kttt kttu ktuc ktui kucc kuce kuci kucr kuei kuek kueu kuic kuie kuik kuke kuki kukk kuku kure kuri kurk kurr kurt kuru kute kuti kutr kutt kutu kuuk kuur kuuu rccc rcet rcic rctc rcti recc rece reci reck recr rect recu reek reet reii reik reir reit reiu reke reki rekt rere reri rert reru rete reti retr rett reue reuk reut reuu ricc rice rick rict riek rier riet rieu rike riki rikk riku rire riri rite riti ritt ritu riue rrrr rtcc rtce rtee rtei ruce ruci ruck ruct ruer ruet ruit ruke ruki rukk ruku rurc rure ruri ruru rute ruti rutt rutu tccc tccu tctc teck tecr tect teec teek teer teet teic teie teir teiu teke ter- terc tere teri terk terr teru tete teti tetr tett tetu teuk teut ticc tice tick tie- tiee tiei tier tiet tiit tiiu tike tiki tiku tire tiri tirr tiru titc tite titi titt titu trcc tre- trec tree trei trek tret treu tri- tric trie trik trit trtc trte trtr truc true truk trut truu tter tttt tucc tuck tuei tuer tuet tuik tuit tuiu tuke turc ture turi turk turr turt turu tute tuti tutt tutu u-ie ucci ucrc ucut ueir ueki uirr ukcc ukek ukeu ukrc ukur urci ure- uret uric urie urik uriu urke urre urri urte uruk urur urut utec uter utik utri utti uttu uuri uuuu

-tree c-kit c-tec ccccc cccii ccett cciii ccitt ceci- cecie cecri ceere ceirt cerc- cerce cerci cerec cerer ceret ceric cerie cerik cerke cerre certe cetic cetki cette ceuti cicek cicer ciceu cicke cieck cietc circe circk ciric cirie cirke cirr- cirri citec