bbbb bbch bbeb bcbc bccc bcec bche bebb bebe bebo bech beeb beo- bhcc bobb bobe bobo boce boch boco boec boee boeo boho boob booc booe booh c-bo cbbc cbcc cbce cbec cbee ccbc cccb cccc ccee cche ccob ccoc cec- cece ceco ceeb ceec chce chch cheb chec chee cheh choc choh choo cobb cobe cobh cobo coce coch coco coho coob cooh ebbc ebbo ebcc eboe eboo ecbc ecbe eccb eccc ecce ecco eche echo eco- eeee eeoc ehcc eheh hboc hcbc hccb hccc hcch hebb hebe hebo hech heeb hehe heho hhhh hobe hobo hoce hoch hohe hoho hooe o-eo obbo obec oboe ocbc occc oce ocee oche oec- oecc oeec ohbe ohcc ohee ohho ohob ohoh oobe ooho oooh oooo