bbbb bbci bcbc bcbg bccc bcci bcvo bibb bibi bibo bicc bicg bici bico bigb bigc bigg bigo bio- bioc biog bioi bivi bobb bobi bobo boco bogg bogi bogo boi- boii boob booc boog bovi bovo c-bo cbbc cbcc cbgb cbvb cbvg ccbc cccb cccc ccci cccv ccgc ccic ccii cciv ccob ccoc ccvi ccvo cgcc cgcg cibc cibi cibo cicc cici cico cigi ciii ciob civc civo cobb cobi cobo coco cogi cogo coob covo cvcc cvii gbbo gc-c gcbc gccc gcic gcii gciv gcov gggg gibb gigg gigi gigo giog gioi gobi gobo gogi gogo goog gooi govi gvvv i-go icbc iccb iccc icci icco icgc icoc igbc igbo igcc igoo iiii iiio iioi iioo iobi iocg ioci ioii ioio iooi iooo ivbv ivic ivig obbo oboi obvi ocbc occc occi ogb oggi ogog ogoi oici oigo oiii oobi oooo ovi- ovo- ovoo vbcc vcbi vcci vgcc vic- vici vico vigo viii vivi vivo voic voio vooc voog vvob vvog vvvv