-ene -one bbbb bbeb bbfc bbfn bbrc bcbc bccc bcec bcer bcfc bcof bcor bebb bebe bebo beeb beef been beer befe beff befo bene benn beno beo- beof beon beor berc bere bern bero berr bner bnoc bnor bnrr bobb bobe bobo boce boco boec boee boef boen boeo boer bofe boff bonc bone bonn bono boob booc booe boof boon boor bor- bore borf born boro borr brcb brce breb brec bree bref bren breo brer brfc brno brob broc broe bron broo bror brrr c-bo cbbc cbcc cbce cbcn cbcr cbec cbee cbef cber cbfb cbfc cbre cbrn ccbc ccbn cccb cccc cccf ccee ccfc ccff ccnb ccnc ccne ccnf ccnr ccob ccoc ccrc ccre ccrf cec- cece ceco ceeb ceec cef- cefc cefn cen- cene ceno ceor cer- cerc cere cerf cern cero cfbc cfbn cfbr cfcb cfcf cfcn cfco cffb cffr cfnb cfnr cfor cfrb cfre cfrn cnbc cnco cnrc cnrr cobb cobe cobo coce coco coen cofc cofe coff con- conc cone conf conn cono coob coof coon cor- corb corc core corf corn coro corr crbc crcc crce crcr cre- creb crec cree cren creo crfc crne crob croc croe cron croo cror ebbc ebbo ebbr ebcc eben eber ebfc ebno eboe ebon eboo ebor ebro ecbc ecbe eccb eccc ecce ecco ecef ecfc ecfr ecne eco- econ ecrc ecrf ecrr eeee eefe eefn eeoc eerc eero efbr efco efen efeo efon efor enb- enbn enbr ence enco enee eneo ener enfb ennc enne eno- enoc enoe enon eone eore erbb erbe ercc erce ereb erec eren erer erfc erne erno erob eroc eroe eron eroo errc erre erro fccf febo fece feeb feen feer fefc fefe feff fefo fene fenn feof feon ferb ferc fere fern fero ferr ffcc ffee ffff ffrr foce foco foer fofo fone fono foof foon for- forb fore forn foro forr frbc frcc frcn free fren freo frfc frob froe fron nbbc nbbo nbcc nbco nber nbfc ncbc nccc nccf nccn nccr ncec ncee ncef ncen ncer ncfc ncfe ncnc ncoc ncor ncrc ncre nebb nebe nebn nebo nebr necc nece neco necr neeb neef neen neer nefe neff nene neno neo- neoc neon neoo nerc nere nerf nero nerr nfer nfff nfon nnnn nobc nobo noce noco noer non- none nonn nono noo- noob noon nooo noor nor- norb norc nore norf norn noro norr nren nrfc nroc nron nrrc o-eo obbo obec oben ober oboe obon obor obre obro ocbc 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- oneb onec onee oneo oner onne onno onon onor oobe oocr ooer ooff oone oooo oore orbb orbe orbo orce orco ore- oreb orec oren oreo orer orfe orff ornc orne orno oro- oroe orof oron oror orro rbbb rbbr rcbc rcbo rccb rccc rcfc rcnr rcon rebb rebe rebo recc rece recr reeb reef reen refe reff refn refr rene renn reno reof rere rero rfef rffc rnbr rnco rob- robb robe robo rocc roce roco roen roer rofc rofe roff rofo ronc rone rono roob roof roon roor rorc rore roro rrfc rrrr