c-cd cccc cccf ccdc ccdf ccdr cced ccee ccfc ccfd ccff ccoc ccod ccrc ccre ccrf cd-e cd-r cddr cdec cdef cder cdfe cdre cec- cece ceco cedd cede cedo ceec cef- cefc ceke ceor cer- cerc cerd cere cerf cero cfcf cfco cffr cfor cfre ckck ckco ckdo cker ckfr ckoc ckoo ckor ckrc ckrd coce cock coco codd code coed cofc cofe coff cok- coke coko cood coof cook cor- corc cord core corf cork coro corr crcc crce crcr crdc cre- crec cred cree creo crfc crkc croc crod croe crok croo cror dccc dcfc dcrk dddd ddoc ddrc ddre dec- decc decd dece deck deco dedd dede dedo deed deef deek deer defe deff defo dek- deke deor der- derc dere derf derk dero derr dfcc dfco dfer dfoe dfrf dkdc doce dock doco dod- dodd dode dodo doek doer doff doke doko dood doof dook door dorc dord dore dorf dork doro dorr dred dree dref drek drfc drod drof eccc ecce ecco ecdc ecdf eced ecef ecfc ecfr ecko eco- ecod ecrc ecrf ecrr eddc edde eddo ede- eder edoc edod eede eeee eefe eeke eeoc eerc eero efco efeo efke efor ekco eked ekek eker ekfc eocd eode eore ercc erce erde erdf erec ered erer erfc erke eroc erod eroe eroo errc erre erro f--k fccf fdoc fece feck fede feed feek feer fefc fefe feff fefo feke feko feod feof ferc ferd fere ferk fero ferr ffcc ffee ffff ffrr foce fock foco fode foed foer fofo foke food foof fook for- ford fore fork foro forr frcc fred free freo frfc froe kccc kccd kcck kccr kcdc kcdd kcdr kcec kced kcee kceo kcfc kcfd kcfo kckc kckf kckk kcko kckr kcoe kcof kcor kcrc kcro kcrr kdcc kdcd kdce kdco kdcr kddc kddd kddf kddk kddr kdec kdef kdfc kdfo kdfr kdkd kdkk kdko kdkr kdoc kdoe kdok kdrf kdro keck keco kecr kedc kedd kede kedo kedr keed keef keek keer kefc keff kefr kekc keke keko keok ker- kerc kere kerf kerk kero kerr kfcd kfcf kfco kfcr kfed kfer kfff kffk kfok kfoo kfor kfrc kfrd kfre kfro kfrr kkcd kkck kkco kkcr kkdc kkdd kkdo kked kkfr kkkk kkoo kkor kkrc kkre kkrf kkrk kkro kkrr kocd kocf kock kode kodk kodo koed kofc kofe koff kofk kofo kokc koke kokf kokk koko kokr kooc kook kooo koor korc kord kore korf kork koro korr krcc krcd krce krco krdc krdd krde krdo krdr krec kred kree kref krek kreo krfc krfd krfe krff krfo krkc krkd krke krkk krko krkr kroc krod kroe krof krok kroo kror krrc krre krrf krrk krro krrr o-eo occc oce oced ocee ocef ocke ocre ocro ocrr oddd oded odeo oder odoo odor oec- oecc oedo oeec oere ofcr ofdr ofek ofer off- offc offe offo offr ofor ofre oked oker okko okok okor okre okro oocr ooer ooff oooo oord oore orce orco orde ordo ore- orec ored orek oreo orer orfe orff orke orko oro- oroe orof orok oror orro rccc rcdc rcde rcfc rcrd rder rdoc recc recd rece reck recr redc redd rede redo redr reed reef reek refd refe reff refr reke reko reod reof rerd rere rero rfef rffc rkkf rocc roce rock roco rodd rode rodo roed roer rofc rofe roff rofo roke rokk roko rokr rood roof rook roor rorc rore rork roro rred rrfc rrrr