bbbb bbci bbox bcbc bccc bcci bcit bctc bibb bibi bibo bicc bici bico bio- bioc bioi biot biox bitc bito bitt bitx bixi bobb bobi bobo boco boi- boii boit boob booc boot boox botb boti boto bott btcc btcx btob bttb c-bo cbbc cbcc cbct cbit cbot cbox cbtc ccbc cccb cccc ccci ccic ccii ccix ccob ccoc cctb cctc cctt ccxi cibc cibi cibo cicc cici cico cict ciii ciit ciob citb citi cito citt cixi cobb cobi cobo coco coct coit coix coob coot cotb cotc coti coto cott ctbi ctic ctot cxii cxix cxxi cxxx ibot ibox ibtb ibtc icbc iccb iccc icci icco icct icoc iiii iiio iiit iioi iioo iitt iobi ioci ioii ioio ioit iooi iooo ioto itic itoi itoo itto ixxi obbo obit obix oboi obot obox ocbc occc occi occt oct- octi octo oici oiii oitc oiti oobi oooo ootb otic otit oto- otoo otti otto oxi- oxic oxo- oxox oxxo tbcb tbcc tbit tbox tccc tctc tibi ticc tico tiit titc titi tito titt tixt tobi tobo tobt toci toco toit toot totc toti toto tott tox- toxi toxo toxt ttbb tttt txii xbox xcii xibo xico xiii xito xixi xobc xoco xoxo xxii xxix xxxi xxxo xxxx