-er -ey c-- ccc cce cck cco ccr cct ce- cec cee cek ceo cer cet cey ckc cko ckt cky co- coc coe cok coo cor cot coy crc cre crk cro crr crt cry ctc cte ctk cto ctr ctt cty cyc cye cyk cyo cyr cyt ec- ecc ece eck eco ecr ect eec eee eek eeo eer eet eey ekc eke eko ekr ekt eky eo- eoc eoe eok eoo eor eot erc ere erk ero err ert ery etc ete etk eto etr ett ety eyc eye eyo eyr eyt k-t kcc kce kck kcr kct ke- kec kee kek keo ker ket key kkc kke kkk kkr kkt kky koc koe kok koo kor kot koy krc krk kro krr krt kry ktc kte ktk kto ktr ktt kyc kye kyo kyr kyt oc- occ ock oco ocr oct oec oee oeo oer oet oey okc oke okk oko okr oo- ooc ook ooo oor oot or- orc ore ork oro orr ort ory ot- otc ote otk oto otr ott oye oyo rcc rce rco rcr rct re- rec ree rek reo rer ret rey rkc rke rkk rko rkt rky roc roe rok roo ror rot roy rrc rrk rrr rrt rtc rte rtk rto rtr rtt rty ry- ryc rye ryk ryo ryr ryy tcc tce tck tco tcr tct te- tec tee tek teo ter tet tey tkc tke tkk tko tkr tkt tky to- toc toe tok too tor tot toy trc tre trk tro trr trt try ttc tte ttk tto ttr ttt tty tyc tye tyo tyr tyt ycc yce yco ycy yec yee yek yeo yer yet yey ykk yoc yoe yok yoo yor yot yoy yrc yre yro yrt ytc yte ytk yto ytr ytt yyc yye yyt yyy

cccc ccee ccoc ccrc ccre ccrt cctc cctt cec- cece ceco cect ceec ceke ceor cer- cerc cere cero cert cery cet- cete ceto ckck ckco ckcy cker ckey ckoc ckoo ckor ckot ckoy ckrc ckry ckty coce cock coco coct cok- coke coko coky cook coot cor- corc core cork coro corr cort cory cotc cote coto cott coty coyo coyr coyt crcc crce crcr cre- crec cree creo cret crkc croc croe crok croo cror crot croy crrt crtc cry- cryo ctec ctor ctot ctrc cyc- cycc cyke cyre cyrk cyrt cyt- cyte cyto cyy- cyyc eccc ecce ecco ecct ecko ecky eco- ecot ecrc ecrr ect- ectc ecto eeee eeke eeoc eerc eero eery eetc eete ekco ekek eker eket eore eotc eoto ercc erce erec erer eret erke eroc eroe eroo errc erre erro eryc erye etcc etco etec etee eter etoe etok etoy etre etro ette etto etty eyck eyec eyer eyet eyey eyke eyot eyre eyry eyte eyyr kccc kcck kccr kcct kccy kcec kcee kceo kcet kcey kckc kckk kcko kckr kcky kcoe kcor kcot kcrc kcro kcrr kcrt kcry kctc kcte kcto kcty kcye kcyk kcyt kcyy keck keco kecr keek keer keet kekc keke keko keok ker- kerc kere kerk kero kerr kert ket- ketc kete ketk keto ketr kett kety keye keyy kkck kkco kkcr kkct kkcy kkkk kkoo kkor kkot kkoy kkrc kkre kkrk kkro kkrr kkrt kktc kktk kkty kkyc kkyy kock koct kokc koke kokk koko kokr koky kooc kook kooo koor koot korc kore kork koro korr kort kotc kote kotk koto kotr kott koty koye koyo koyt koyy krcc krce krco krec kree krek kreo kret krkc krke krkk krko krkr krky kroc kroe krok kroo kror kroy krrc krre krrk krro krrr krrt krry krtc krtk krto krtr krty krye kryk kryo kryy ktcc ktce ktck ktco ktcr ktcy ktec ktee ktek ktkc ktke ktkk ktko ktkr ktkt ktoc ktoe ktok ktoo ktor ktot ktoy ktrc ktre ktrk ktro ktrr ktrt ktry kttc kttk ktto kttr kttt ktty ktyr kycc kyck kycr kyct kyee kyet kykc kyke kykk kykr kyky kyok kyoo kyor kyot kyoy kyrc kyre kyrk kyro kytc kyte kyto kytt kyty kyyk kyyo kyyt kyyy o-eo occc occt oce ocee ocet ocke ocre ocro ocrr oct- octe octo octy oec- oecc oeec oere oeye oeyo oker oket okey okko okok okor okot okre okro okto okyo oocr ooer ooky oooo oore oort oory ooty orce orco ore- orec orek oreo orer orey orke orko oro- oroe orok oror orot oroy orro orry ortc orte orto otee oter oto- otoe otok otoo otor otoy otre otro otry otte otto otyr oyce oyee oyer oyke oyre rccc rcet rctc rcyc recc rece reck recr rect recy reek reet reke reko rekt reky reot rere rero rert rery rete reto retr rett rety reye reyk rocc roce rock roco roer roet roey roke rokk roko rokr roky rook roor root rorc rore rork roro rort rory rotc rote rotk roto rotr rott roty roye royt rrrr rtcc rtce rtee ryck ryet ryke ryot rytt ryyt tccc tctc teck teco tecr tect teec teek teer teet teke teok teor ter- terc tere terk tero terr tery tete teto tetr tett teye teyk teyr tkey to-y toce tock toco toee toek toer toet toey toke toko toky took toor toot torc tore tork toro torr tort tory totc tote toto totr tott toty toyo toyt trcc tre- trec tree trek treo tret trey troc troe troo trot troy trtc trte trtr try- trye tryo tteo tter ttoe ttoy tttt tyce tyck tyco tyee tyek tyer tyet tyke tyr- tyre tyro tyrr tyte tyto tytt tyty yccc ycee yctc yeck yeek yeer yeet yeke yeot yere yerk yero yerr yert yery yete yeto yett yeye yeyo yeyr ykey ykko ykyt yock yoke yoko yoky yook yoot yore york yoro yort yory yote yott yoye yoyo yrke ytky ytre yyyy

-tree c-cor c-tec ccccc ccett ccoyo ceco- cecyt ceere cekyr ceoce ceoor cerc- cerce cerco cerec cerer ceret cerke cero- ceroc cerre cerro certe certy ceto- cette cetty co-co cocc- cocce cocco coceo cocke