bbbb bbch bboy bbyo bcbc bccc bctc bhcc bhot bhoy bobb bobo boby boch boco boho boht bohy boob booc booh boot botb both boto bott boty boyo btcc btob bttb bych byob byoc byth c-bo cbbc cbcc cbct cbot cbtc cbyt ccbc cccb cccc cchy ccob ccoc cctb cctc cctt chch choc choh choo choy chto chtt chy- chyc cobb cobh cobo coby coch coco coct coho coob cooh coot cotb cotc coth coto cott coty coyo coyt ctot cybb cybc cybo cyc- cycb cycc cyt- cytb cyto cyy- cyyc hboc hcbc hccb hccc hcch hhhh hobo hoby hoch hoho hoot hotb hoth hoto hott hoyt htcc htoh hybo hyo- obbo obby obot oboy ocbc occc occt ocht oct- octo octy ohcc ohho ohob ohoh ohto ohyo ooby ooho oooh oooo ootb ooty otho oto- otoh otoo otoy otto oych tbcb tbcc tcby tccc tch- tchh tcho tctc thch thoo thot thtb thyh to-y tobo tobt toby toch toco toho tooh toot totc toth toto tott toty toyb toyo toyt ttbb ttoy tttt tybo tyco tyht tyto tytt tyty yccc ycch yctc yobo yoch yoho yoot yott yoyo ytch ytht yyyy