bbbb bbci bbrc bbrg bcbc bcbg bccc bcci bcor bibb bibi bibo bicc bicg bici bico bigb bigc bigg bigo bio- bioc biog bioi birb birg biri biro birr bobb bobi bobo boco bogg bogi bogo boi- boii boob booc boog boor bor- borg bori boro borr brcb bric brig brio brob broc brog broo bror brrr c-bo cbbc cbcc cbcr cbgb cbir ccbc cccb cccc ccci ccgc ccic ccii ccir ccob ccoc ccrc ccrg ccri cgcc cgcg cgro cibc cibi cibo cicc cici cico cicr cigi ciii ciob cior cirb circ ciri ciro cirr cobb cobi cobo coco cogi cogo coir coob cor- corb corc corg cori coro corr crbc crcc crcr crib cric crig crob croc croo cror gbbo gc-c gcbc gccc gcic gcii gcrg gggg gibb gicr gigg gigi gigo giog gioi girg giri giro girr gobi gobo gocr gogi gogo goog gooi goor gorb gorg gori goro gorr grbr grcc grib gric grig grob groc grog groi groo gror grrr i-go ibrc ibri ibro icbc iccb iccc icci icco iccr icgc icoc icor icrc icrr igbc igbo igcc igoo igor igri iiii iiio iioi iioo iirc iobi iocg ioci ioii ioio iooi iooo iorg iori ircc ircg iri- iric irig irio irob iroc irrc irri obbo oboi obor obri obro ocbc occc occi ocro ocrr ogb oggi ogog ogoi ogri ogro oici oigo oiii oobi oocr oooo orbb orbi orbo orci orco orgo ori- oric orig orio oro- oror orri orro rbbb rbbr rcbc rcbo rccb rccc rcgc rcic rcrg rgbi rib- ribo ricc rico rigg rigi rigo riri rob- robb robi robo rocc roco rogg rogi rogo roig roio roir roob roog rooi roor rorc rori roro rrrr