bbbb bbgm bbmg bibb bibi bibo bigb bigg bigo bimo bio- biog bioi bmmi bobb bobi bobo bogg bogi bogo boi- boii boim bomb bomi boob boog boom gbbo gggg gibb gigg gigi gigo gimo giog gioi gobi gobo gogi gogo gomb gomi gomo goog gooi goom i-go ibbm ibim igbo igoo iiii iiio iioi iioo imbi immi immo iobi ioii ioio iomo iooi iooo mbim mbio migg migi migo miii miio mim- mimi mimo mio- mmii mmmm mobb mobi mobo mogg mogi mogo moii moio momi momo moob moog obbo oboi ogb oggi ogog ogoi oigo oiii oimb ombo omim omio omo- omoi omoo oobi oooo