c-cd cccc cccf ccdc ccdf ccdr cced ccee ccfc ccfd ccff ccrc ccre ccrf cd-e cd-r cddr cdec cdef cder cdfe cdre cec- cece cedd cede ceec cef- cefc ceke cer- cerc cerd cere cerf cfcf cffr cfre ckck cker ckfr ckrc ckrd crcc crce crcr crdc cre- crec cred cree crfc crkc dccc dcfc dcrk dddd ddrc ddre dec- decc decd dece deck dedd dede deed deef deek deer defe deff dek- deke der- derc dere derf derk derr dfcc dfer dfrf dkdc dred dree dref drek drfc eccc ecce ecdc ecdf eced ecef ecfc ecfr ecrc ecrf ecrr eddc edde ede- eder eede eeee eefe eeke eerc efke eked ekek eker ekfc ercc erce erde erdf erec ered erer erfc erke errc erre f--k fccf fece feck fede feed feek feer fefc fefe feff feke ferc ferd fere ferk ferr ffcc ffee ffff ffrr frcc fred free frfc kccc kccd kcck kccr kcdc kcdd kcdr kcec kced kcee kcfc kcfd kckc kckf kckk kckr kcrc kcrr kdcc kdcd kdce kdcr kddc kddd kddf kddk kddr kdec kdef kdfc kdfr kdkd kdkk kdkr kdrf keck kecr kedc kedd kede kedr keed keef keek keer kefc keff kefr kekc keke ker- kerc kere kerf kerk kerr kfcd kfcf kfcr kfed kfer kfff kffk kfrc kfrd kfre kfrr kkcd kkck kkcr kkdc kkdd kked kkfr kkkk kkrc kkre kkrf kkrk kkrr krcc krcd krce krdc krdd krde krdr krec kred kree kref krek krfc krfd krfe krff krkc krkd krke krkk krkr krrc krre krrf krrk krrr rccc rcdc rcde rcfc rcrd rder recc recd rece reck recr redc redd rede redr reed reef reek refd refe reff refr reke rerd rere rfef rffc rkkf rred rrfc rrrr