-er c-- ccc cce cck ccl ccr cct ccu ce- cec cee cek cel cer cet ceu ckc ckt cl- clc cle clk cll clr clt clu crc cre crk crl crr crt cru ctc cte ctk ctl ctr ctt ctu cuc cue cuk cul cur cut cuu ec- ecc ece eck ecl ecr ect ecu eec eee eek eel eer eet ekc eke ekl ekr ekt eku elc ele elk ell elr elt elu erc ere erk erl err ert eru etc ete etk etl etr ett etu eu- euc eue eul eur eut k-t kcc kce kck kcl kcr kct kcu ke- kec kee kek kel ker ket kkc kke kkk kkl kkr kkt kku kl- klc klr klt klu krc krk krl krr krt kru ktc kte ktk ktl ktr ktt ktu kuc kue kuk kul kur kut kuu lcc lce lck lcl lcr lct lcu lec lee lek lel ler let leu lkl lkr lkt llc lle llk lll llr llt llu lrc lrk lrr lrt lru ltc lte ltk ltl ltr ltt ltu luc lue luk lul lur lut luu rcc rce rcl rcr rct rcu re- rec ree rek rel rer ret reu rkc rke rkk rkt rku rlc rle rll rlr rlt rlu rrc rrk rrl rrr rrt rru rtc rte rtk rtl rtr rtt rtu ruc rue ruk rur rut ruu tcc tce tck tcl tcr tct tcu te- tec tee tek tel ter tet teu tkc tke tkk tkl tkr tkt tlc tle tlk tll tlr tlt tlu trc tre trk trl trr trt tru ttc tte ttk ttl ttr ttt ttu tuc tue tuk tul tur tut tuu ucc uce uck ucl ucr uct ucu uec uee uel uer uet ukc uke ukk ukl ukr uku ulc ule ulk ull ulr ult ulu ur- urc ure urk url urr urt uru utc ute utk utl utr utt utu uuc uue uur uut uuu

cccc cccl cccu ccee ccel cclc ccrc ccre ccrl ccrt cctc cctl cctt ccuc ccut cec- cece cect ceec ceel ceke cel- celc cele cell celt cer- cerc cere cerl cert cet- cete ckck ckcl cker ckrc clec clee clek cler clet cleu cltc clue clut crcc crce crcr cre- crec cree cret creu crkc crkl crrt crtc crtl crue cruk crut ctec ctle ctrc ctrl cucc cuce cuck cuek cuer cuk- cuke culc cule culk cull cult cure curl curr curt cut- cutc cute cutt e-cl eccc ecce eccl ecct eclt ecrc ecrl ecrr ecru ect- ectc eeee eeke eele eerc eetc eete eetu ekek eker eket ekur elce elec elee elek eler elet elke elle ellu elte elue elul ercc erce erec erel erer eret erke erle erll errc erre ertl ertu eruc erur etcc etec etee etel eter etre ette ettu euer eule eur- eurc eure eurt kccc kcck kccl kccr kcct kccu kcec kcee kcel kcet kceu kckc kckk kckl kckr kclc kcle kclk kcll kclr kclt kclu kcrc kcrr kcrt kcru kctc kcte kctu kcue kcuk kcul keck kecr keek keel keer keet kekc keke kekl keku kele kelk kell kelt kelu ker- kerc kere kerk kerl kerr kert keru ket- ketc kete ketk ketr kett ketu keul keur kkck kkcl kkcr kkct kkkk kklc kkll kkrc kkre kkrk kkrl kkrr kkrt kktc kktk kktl kktu kkut kkuu klcc klce klck klcl klcr klec klee klek kler klet klkc klkk klkl klkr kllc klle kllk klrc klrk klrr klru kltc kltk kltr kltt klue kluk klur kluu krcc krce krcl krcu krec kree krek kret kreu krkc krke krkk krkr krku krlc krle krlt krrc krre krrk krrl krrr krrt krtc krtk krtr kruc krue kruk krul krur ktcc ktce ktck ktcl ktcr ktec ktee ktek ktel ktkc ktke ktkk ktkr ktkt ktku ktlk ktlr ktlt ktlu ktrc ktre ktrk ktrl ktrr ktrt ktru kttc kttk kttr kttt kttu ktuc ktul kucc kuce kucr kuek kuel kueu kuke kukk kukl kuku kule kull kult kulu kure kurk kurl kurr kurt kuru kute kutr kutt kutu kuuk kuul kuur kuuu lccc lcce lcer lcrl lctl le-u lece leck lect leek leel leer leet leke lekk lele lell lelu lerc lere lerk lert lete lett leuc leuk leur llcc llet lleu lllc llll lrrc lrrr ltcc ltee ltke lttc lttr ltuc luce luck luer luke lule lull lulu lure lurk lurt lute luuk rccc rcet rcle rctc recc rece reck recr rect recu reek reel reet reke rekt rele rell relt rere rert reru rete retr rett reue reuk reul reut reuu rlee rleu rrle rrrr rtcc rtce rtee rtle rtlt ruce ruck ruct ruel ruer ruet ruke rukk ruku rule rulk rull rurc rure ruru rute rutl rutt rutu tccc tccu tctc tcul teck tecl tecr tect teec teek teel teer teet teke tel- telc tele tell telt telu ter- terc tere terk terr teru tete tetr tett tetu teuk teut trcc trcl tre- trec tree trek tret treu trtc trte trtr truc true truk trut truu tter tttt ttul tucc tuck tuel tuer tuet tuke tule tulk tull tulu turc ture turk turr turt turu tute tutl tutt tutu ucel ucrc ucut uele uell ukcc ukek ukeu ukrc ukur ulcc ulee ulek ulle ullr ultt uluk ulul ure- uret urke urle urre urte uruk urur urut utec utel uter uttu uulu uuuu

-tree c-tec ccccc ccell ccett ccrcl ccrel cctrl ceele ceere celer cell- celle celte cerc- cerce cerec cerer ceret cerke cerre certe cette cleck cleek cleer cleet cleke clerc clere clerk clete clett cleuk cluck clue- cluer cluke clurr clute clutt crece creek creel creer creke crele crell crete cretu creu- creue creul crrel cruce cruck cruel cruet cruke crule crull crure ctree ctrlc cttee ctulu cucuk cuker culet culle cullu culur curce curel curer curet curle curll curlu curre cutcu cutee cuter cutle cuuel eccle eckel ecker eckle eecke eeeee eeler ekker ekuku ekuru elect eleet elele eleut ellek ellel eller ellet ellul elrec eltek elulu eluru elute erect