-er c-- ccc cce cck cco ccr cct ccu ce- cec cee cek ceo cer cet ceu ckc cko ckt co- coc coe cok coo cor cot cou crc cre crk cro crr crt cru ctc cte ctk cto ctr ctt ctu cuc cue cuk cuo cur cut cuu ec- ecc ece eck eco ecr ect ecu eec eee eek eeo eer eet ekc eke eko ekr ekt eku eo- eoc eoe eok eoo eor eot eou erc ere erk ero err ert eru etc ete etk eto etr ett etu eu- euc eue eur eut k-t kcc kce kck kcr kct kcu ke- kec kee kek keo ker ket kkc kke kkk kkr kkt kku koc koe kok koo kor kot kou krc krk kro krr krt kru ktc kte ktk kto ktr ktt ktu kuc kue kuk kur kut kuu oc- occ ock oco ocr oct ocu oec oee oeo oer oet okc oke okk oko okr oku oo- ooc ook ooo oor oot or- orc ore ork oro orr ort oru ot- otc ote otk oto otr ott otu ou- ouc oue ouk ouo our out rcc rce rco rcr rct rcu re- rec ree rek reo rer ret reu rkc rke rkk rko rkt rku roc roe rok roo ror rot rou rrc rrk rrr rrt rru rtc rte rtk rto rtr rtt rtu ruc rue ruk ruo rur rut ruu tcc tce tck tco tcr tct tcu te- tec tee tek teo ter tet teu tkc tke tkk tko tkr tkt to- toc toe tok too tor tot tou trc tre trk tro trr trt tru ttc tte ttk tto ttr ttt ttu tuc tue tuk tuo tur tut tuu ucc uce uck uco ucr uct ucu uec uee uer uet ukc uke ukk ukr uku uoc uoe uok uoo uor uot ur- urc ure urk uro urr urt uru utc ute utk uto utr utt utu uuc uue uur uut uuu

cccc cccu ccee ccoc ccrc ccre ccrt cctc cctt ccuc ccut cec- cece ceco cect ceec ceke ceor ceou cer- cerc cere cero cert cet- cete ceto ckck ckco cker ckoc ckoo ckor ckot ckrc coce cock coco coct cocu cok- coke coko cook coot cor- corc core cork coro corr cort cotc cote coto cott cotu coue couk cour cout crcc crce crcr cre- crec cree creo cret creu crkc croc croe crok croo cror crot crrt crtc crue cruk crut ctec ctor ctot ctrc cucc cuce cuck cuek cuer cuk- cuke cure curo curr curt cut- cutc cute cuto cutt eccc ecce ecco ecct ecko eco- ecot ecou ecrc ecrr ecru ect- ectc ecto eeee eeke eeoc eerc eero eetc eete eetu ekco ekek eker eket ekur eore eotc eoto ercc erce erec erer eret erke eroc eroe eroo errc erre erro ertu eruc erur etcc etco etec etee eter etoe etok etre etro ette etto ettu euer eur- eurc eure euro eurt kccc kcck kccr kcct kccu kcec kcee kceo kcet kceu kckc kckk kcko kckr kcoe kcor kcot kcou kcrc kcro kcrr kcrt kcru kctc kcte kcto kctu kcue kcuk keck keco kecr keek keer keet kekc keke keko keku keok ker- kerc kere kerk kero kerr kert keru ket- ketc kete ketk keto ketr kett ketu keur kkck kkco kkcr kkct kkkk kkoo kkor kkot kkrc kkre kkrk kkro kkrr kkrt kktc kktk kktu kkut kkuu kock koct kokc koke kokk koko kokr koku kooc kook kooo koor koot koou korc kore kork koro korr kort koru kotc kote kotk koto kotr kott kotu koue kour kout kouu krcc krce krco krcu krec kree krek kreo kret kreu krkc krke krkk krko krkr krku kroc kroe krok kroo kror krrc krre krrk krro krrr krrt krtc krtk krto krtr kruc krue kruk krur ktcc ktce ktck ktco ktcr ktec ktee ktek ktkc ktke ktkk ktko ktkr ktkt ktku ktoc ktoe ktok ktoo ktor ktot ktrc ktre ktrk ktro ktrr ktrt ktru kttc kttk ktto kttr kttt kttu ktuc kucc kuce kuco kucr kuek kueu kuke kukk kuku kuok kuoo kure kurk kuro kurr kurt kuru kute kuto kutr kutt kutu kuuk kuur kuuu o-eo occc occt oce ocee ocet ocke ocre ocro ocrr oct- octe octo ocur oec- oecc oeec oere okcu oker oket okko okok okor okot okre okro okto okur oocr ooer ooku oooo oore oort orce orco ore- orec orek oreo orer orke orko oro- oroe orok oror orot orro ortc orte orto otee oter oto- otoe otok otoo otor otre otro otte otto ottu otur oucc ouer our- oure ouro ourt out- oute outo ouu- rccc rcet rctc recc rece reck recr rect recu reek reet reke reko rekt reot reou rere rero rert reru rete reto retr rett reue reuk reut reuu rocc roce rock roco roer roet roke rokk roko rokr roku rook roor root rorc rore rork roro rort roru rotc rote rotk roto rotr rott roue rouk rout rrrr rtcc rtce rtee ruce ruck ruct ruer ruet ruke rukk ruku ruok rurc rure ruro ruru rute ruto rutt rutu tccc tccu tctc teck teco tecr tect teec teek teer teet teke teok teor ter- terc tere terk tero terr teru tete teto tetr tett tetu teuk teut toce tock toco toee toek toer toet toke toko toku took toor toot torc tore tork toro torr tort toru totc tote toto totr tott touk tour tout trcc tre- trec tree trek treo tret treu troc troe troo trot trou trtc trte trtr truc true truk trut truu tteo tter ttoe tttt tucc tuck tuco tuer tuet tuke tuko tuor turc ture turk turo turr turt turu tute tuto tutt tutu tuuo ucrc ucut ukcc ukek ukeu ukko ukok ukrc ukur uocc uoke uor- uore ure- uret urke uro- urok uroo urre urte uruk urur urut utec uter utor utto uttu uuoc uuuu

-tree c-cor c-tec ccccc ccett ceco- ceere ceoce ceoor cerc- cerce cerco cerec cerer ceret cerke cero- ceroc cerou