-ene -one cccc cccf ccee ccfc ccff ccnc ccne ccnf ccnr ccoc ccrc ccre ccrf cec- cece ceco ceec cef- cefc cefn cen- cene ceno ceor cer- cerc cere cerf cern cero cfcf cfcn cfco cffr cfnr cfor cfre cfrn cnco cnrc cnrr coce coco coen cofc cofe coff con- conc cone conf conn cono coof coon cor- corc core corf corn coro corr crcc crce crcr cre- crec cree cren creo crfc crne croc croe cron croo cror eccc ecce ecco ecef ecfc ecfr ecne eco- econ ecrc ecrf ecrr eeee eefe eefn eeoc eerc eero efco efen efeo efon efor ence enco enee eneo ener ennc enne eno- enoc enoe enon eone eore ercc erce erec eren erer erfc erne erno eroc eroe eron eroo errc erre erro fccf fece feen feer fefc fefe feff fefo fene fenn feof feon ferc fere fern fero ferr ffcc ffee ffff ffrr foce foco foer fofo fone fono foof foon for- fore forn foro forr frcc frcn free fren freo frfc froe fron nccc nccf nccn nccr ncec ncee ncef ncen ncer ncfc ncfe ncnc ncoc ncor ncrc ncre necc nece neco necr neef neen neer nefe neff nene neno neo- neoc neon neoo nerc nere nerf nero nerr nfer nfff nfon nnnn noce noco noer non- none nonn nono noo- noon nooo noor nor- norc nore norf norn noro norr nren nrfc nroc nron nrrc o-eo occc occn oce ocee ocef ocon ocre ocro ocrr oec- oecc oeec oen- oeno oere ofcr ofen ofer off- offc offe offo offr ofno ofor ofre onc- once oncf onco one- onec onee oneo oner onne onno onon onor oocr ooer ooff oone oooo oore orce orco ore- orec oren oreo orer orfe orff ornc orne orno oro- oroe orof oron oror orro rccc rcfc rcnr rcon recc rece recr reef reen refe reff refn refr rene renn reno reof rere rero rfef rffc rnco rocc roce roco roen roer rofc rofe roff rofo ronc rone rono roof roon roor rorc rore roro rrfc rrrr