-ene -one bbbb bbeb bbrc bcbc bccc bcec bcer bcor bebb bebe bebo beeb been beer bene benn beno beo- beon beor berc bere bern bero berr bner bnoc bnor bnrr bobb bobe bobo boce boco boec boee boen boeo boer bonc bone bonn bono boob booc booe boon boor bor- bore born boro borr brcb brce breb brec bree bren breo brer brno brob broc broe bron broo bror brrr c-bo cbbc cbcc cbce cbcn cbcr cbec cbee cber cbre cbrn ccbc ccbn cccb cccc ccee ccnb ccnc ccne ccnr ccob ccoc ccrc ccre cec- cece ceco ceeb ceec cen- cene ceno ceor cer- cerc cere cern cero cnbc cnco cnrc cnrr cobb cobe cobo coce coco coen con- conc cone conn cono coob coon cor- corb corc core corn coro corr crbc crcc crce crcr cre- creb crec cree cren creo crne crob croc croe cron croo cror ebbc ebbo ebbr ebcc eben eber ebno eboe ebon eboo ebor ebro ecbc ecbe eccb eccc ecce ecco ecne eco- econ ecrc ecrr eeee eeoc eerc eero enb- enbn enbr ence enco enee eneo ener ennc enne eno- enoc enoe enon eone eore erbb erbe ercc erce ereb erec eren erer erne erno erob eroc eroe eron eroo errc erre erro nbbc nbbo nbcc nbco nber ncbc nccc nccn nccr ncec ncee ncen ncer ncnc ncoc ncor ncrc ncre nebb nebe nebn nebo nebr necc nece neco necr neeb neen neer nene neno neo- neoc neon neoo nerc nere nero nerr nnnn nobc nobo noce noco noer non- none nonn nono noo- noob noon nooo noor nor- norb norc nore norn noro norr nren nroc nron nrrc o-eo obbo obec oben ober oboe obon obor obre obro ocbc occc occn oce ocee ocon ocre ocro ocrr oec- oecc oeec oen- oeno oere onc- once onco one- oneb onec onee oneo oner onne onno onon onor oobe oocr ooer oone oooo oore orbb orbe orbo orce orco ore- oreb orec oren oreo orer ornc orne orno oro- oroe oron oror orro rbbb rbbr rcbc rcbo rccb rccc rcnr rcon rebb rebe rebo recc rece recr reeb reen rene renn reno rere rero rnbr rnco rob- robb robe robo rocc roce roco roen roer ronc rone rono roob roon roor rorc rore roro rrrr