-ene c-cd cccc cccf ccdc ccdf ccdn ccdr cced ccee ccfc ccfd ccff ccnc ccne ccnf ccnr ccrc ccre ccrf cd-e cd-r cddr cdec cdef cder cdfe cdnc cdnf cdre cec- cece cedd cede ceec cef- cefc cefn cen- cend cene cer- cerc cerd cere cerf cern cfcf cfcn cffr cfnr cfre cfrn cndd cnrc cnrr crcc crce crcr crdc cre- crec cred cree cren crfc crne dccc dcfc dddd ddrc ddre dec- decc decd dece dedd dede deed deef deen deer defe deff defn dene denn der- derc dere derf dern derr dfcc dfer dfrf dnce dner dnrc dred dree dref dren drfc eccc ecce ecdc ecdf eced ecef ecfc ecfr ecne ecrc ecrf ecrr eddc edde ede- eden eder edrn eede eeee eefe eefn eend eerc efen ence end- ende ened enee ener ennc enne ercc erce erde erdf erec ered eren erer erfc erne errc erre fccf fece fede fedn feed feen feer fefc fefe feff fend fene fenn ferc ferd fere fern ferr ffcc ffee ffff ffrr fndd fndn fndr frcc frcn fred free fren frfc nccc nccf nccn nccr ncdc ncdn ncdr ncec nced ncee ncef ncen ncer ncfc ncfe ncnc ncnd ncrc ncre ndcc ndde nder ndrc ndre ndrf necc nece necr nedc nedd nede need neef neen neer nefd nefe neff nend nene nerc nerd nere nerf nerr nfdc nfer nfff nnnn nrdc nren nrfc nrrc nrrd rccc rcdc rcde rcfc rcnr rcrd rder recc recd rece recr redc redd rede redr reed reef reen refd refe reff refn refr rend rene renn rerd rere rfef rffc rndc rndf rred rrfc rrrr