bbbb bbeb bbrc bbrg bcbc bcbg bccc bcec bcer bcor bebb bebe bebo beeb beeg beer begg bego beo- beor berc bere berg bero berr bobb bobe bobo boce boco boec boee boeo boer boge bogg bogo boob booc booe boog boor bor- bore borg boro borr brcb brce breb brec bree breg breo brer brob broc broe brog broo bror brrr c-bo cbbc cbcc cbce cbcr cbec cbee cber cbgb cbre ccbc cccb cccc ccee ccgc ccob ccoc ccrc ccre ccrg cec- cece ceco ceeb ceec cege cego ceor cer- cerc cere cero cgcc cgcg cger cgro cobb cobe cobo coce coco cogo coob cor- corb corc core corg coro corr crbc crcc crce crcr cre- creb crec cree creg creo crob croc croe croo cror ebbc ebbo ebbr ebcc eber eboe eboo ebor ebro ecbc ecbe eccb eccc ecce ecco eco- ecog ecrc ecrr eeee eeoc eerc eerg eero egbe egcc egcg egcr egec egee eger eggb egge eggo ego- egor egre eore erbb erbe ercc erce ereb erec erer erg- ergg ergo erob eroc eroe eroo errc erre erro gbbo gc-c gcbc gccc gcrg gebe gece geer gege gegg gego geo- geog gerb gere gero gggg gobe gobo goce gocr goer gogo goog goor gorb gore gorg goro gorr grbr grcc grce greb grec gree greg grob groc grog groo gror grrr o-eo obbo obec ober oboe obor obre obro ocbc occc oce ocee ocre ocro ocrr oec- oecc oeec oegb oere ogb ogbe ogee oger ogge ogog ogre ogro oobe oocr ooer oooo oore orbb orbe orbo orce orco ore- oreb orec oreg oreo orer orge orgo oro- oroe oror orro rbbb rbbr rcbc rcbo rccb rccc rcgc rcrg rebb rebe rebo recc rece recr reeb rege rego regr reog rere rerg rero rgbe rob- robb robe robo rocc roce roco roeg roer roge rogg rogo roob roog roor rorc rore roro rrrr