bbbb bbch bbeb bcbc bcbg bccc bcec bche bebb bebe bebo bech beeb beeg begg bego beo- bhcc bhog bobb bobe bobo boce boch boco boec boee boeo boge bogg bogh bogo boho boob booc booe boog booh c-bo cbbc cbcc cbce cbec cbee cbgb ccbc cccb cccc ccee ccgc cche ccob ccoc cec- cece ceco ceeb ceec cege cego cgcc cgcg chce chch cheb chec chee cheh chgb chge choc choh choo cobb cobe cobh cobo coce coch coco cogh cogo coho coob cooh ebbc ebbo ebcc eboe eboo ecbc ecbe eccb eccc ecce ecco eche echo eco- ecog eeee eeoc egbe egcc egcg egec egee eggb egge eggh eggo eghe eghh ego- ehcc eheh gbbo gc-c gcbc gccc gebe gece gege gegg gego geo- geog gggg gghg ghee gheg gobe gobo goce goch gogh gogo gohb goog hboc hcbc hccb hccc hcch hcgh hebb hebe hebo hech heeb heeg hege hegg hegh hego hehe heho hggc hhgg hhhh hobe hobo hoce hoch hoge hogg hogh hogo hohe hoho hooe o-eo obbo obec oboe ocbc occc oce ocee oche oec- oecc oeec oegb ogb ogbe ogee ogge ogog ohbe ohcc ohee ohho ohob ohoh oobe ooho oooh oooo