-ene -one cccc ccee ccnc ccne ccnr ccoc ccrc ccre cec- cece ceco ceec cen- cene ceno ceor cer- cerc cere cern cero cnco cnrc cnrr coce coco coen con- conc cone conn cono coon cor- corc core corn coro corr crcc crce crcr cre- crec cree cren creo crne croc croe cron croo cror eccc ecce ecco ecne eco- econ ecrc ecrr eeee eeoc eerc eero ence enco enee eneo ener ennc enne eno- enoc enoe enon eone eore ercc erce erec eren erer erne erno eroc eroe eron eroo errc erre erro nccc nccn nccr ncec ncee ncen ncer ncnc ncoc ncor ncrc ncre necc nece neco necr neen neer nene neno neo- neoc neon neoo nerc nere nero nerr nnnn noce noco noer non- none nonn nono noo- noon nooo noor nor- norc nore norn noro norr nren nroc nron nrrc o-eo occc occn oce ocee ocon ocre ocro ocrr oec- oecc oeec oen- oeno oere onc- once onco one- onec onee oneo oner onne onno onon onor oocr ooer oone oooo oore orce orco ore- orec oren oreo orer ornc orne orno oro- oroe oron oror orro rccc rcnr rcon recc rece recr reen rene renn reno rere rero rnco rocc roce roco roen roer ronc rone rono roon roor rorc rore roro rrrr