bbbb bbch bbci bcbc bccc bcci bcit bctc bhcc bhit bhoi bhot bibb bibi bibo bicc bich bici bico bihi bio- bioc bioi biot bitc bith bito bitt bobb bobi bobo boch boco boho boht boi- boii boit boob booc booh boot botb both boti boto bott btcc btob bttb c-bo cbbc cbcc cbct cbit cbot cbtc ccbc cccb cccc ccci ccic ccii ccob ccoc cctb cctc cctt chch chci chib chic chih chit choc choh choi choo chto chtt cibc cibi cibo cicc cich cici cico cict ciht ciii ciit ciob citb cith citi cito citt cobb cobh cobi cobo coch coco coct coho coit coob cooh coot cotb cotc coth coti coto cott ctbi ctic ctot h-ii hbic hbio hbit hboc hcbc hccb hccc hcch hchi hhhh hi-c hibi hibt hicc hich hico hihc hihi hiho hiht hiit hiob hioc hitc hiti hito hitt hobo hoch hoho hoit hoot hotb hoth hoti hoto hott htcc htoh ibot ibtb ibtc icbc iccb iccc icci icco icct ichc ichi icho icoc ihcc ihit ihob ihtc iiht iiii iiio iiit iioi iioo iitt iobi ioci ioii ioio ioit iooi iooo ioto itch ithc itic itoh itoi itoo itto obbo obit oboi obot ocbc occc occi occt ochi ocht oct- octi octo ohcc ohhi ohho ohio ohob ohoh ohto oici oiii oitc oiti oobi ooho oooh oooo ootb otho otic otit oto- otoh otoo otti otto tbcb tbcc tbit tccc tch- tchh tchi tcho tctc thch thi- thic thio thoo thot thtb tibi ticc tich tico tiht tiit titc tith titi tito titt tobi tobo tobt toch toci toco tohi toho toit tooh toot totc toth toti toto tott ttbb tttt