bbbb bbch bbeb bcbc bccc bcec bche bcvo bebb bebe bebo bech beeb beo- bevo bhcc bobb bobe bobo boce boch boco boec boee boeo boho boob booc booe booh bove bovo c-bo cbbc cbcc cbce cbec cbee cbvb cbve ccbc cccb cccc cccv ccee cche ccob ccoc ccvo cec- cece ceco ceeb ceec cevo chce chch cheb chec chee cheh chev choc choh choo chov chvo cobb cobe cobh cobo coce coch coco coho coob cooh cove covo cvcc ebbc ebbo ebcc eboe eboo ecbc ecbe eccb eccc ecce ecco eche echo eco- eeee eeoc ehcc eheh evoe evoo hboc hcbc hccb hccc hcch hebb hebe hebo hech heeb hehe heho heve hhhh hobe hobo hoce hoch hohe hoho hooe hove hvcc o-eo obbo obec oboe ocbc occc oce ocee oche oec- oecc oeec ohbe ohcc ohee ohho ohob ohoh oobe ooho oooh oooo ovee ovo- ovoo vbcc vche vecc vech veho veoh veve vevo vhhh voce voho vooc vvob vvvv