bbbb bbch bbcm bcbc bccc bccm bctc bhcc bhot bmoc bmtc bobb bobo boch bocm boco bohm boho boht bomb bomt boob booc booh boom boot botb both boto bott btcc btob bttb c-bo cbbc cbcc cbcm cbct cbot cbtc ccbc cccb cccc cccm ccmb ccmc ccmm ccob ccoc ccom cctb cctc cctt chch chcm chmb chmc chmo chmt choc choh choo chtm chto chtt cmbc cmcc cmhc cmmb cmmc cmoc cmot cmtc cobb cobh cobo coch coco coct coho com- comb comc comm como coob cooh coom coot cotb cotc coth coto cott ctmo ctot hboc hcbc hccb hccc hcch hcmc hcmm hhhh hmhb hmmm hobo hoch hohm hoho hom- homo hoom hoot hotb hoth hotm hoto hott htcc htoh httm mcbc mccc mcht mcmc mcmt mcot mctc mhmm mmcc mmcm mmct mmhm mmmc mmmh mmmm mobb mobo moch moco mohm moho moht momo moob mooc moot motb moth motm moto mott mtbc mtbo mtom obbo obot ocbc occc occt ocht ocom oct- octo ohcc ohho ohob ohoh ohto ombo omo- omoo ooho oooh oooo ootb otho oto- otoh otoo otto t-mo tbcb tbcc tccc tch- tchh tcho tcom tctc thch thmb thmt thom thoo thot thtb tmbc tmcc tmcm tmtt tobo tobt toch toco toho tomb tomm tomo tomt tooh toom toot totc toth totm toto tott ttbb tttt