bbbb bbcm bbeb bbet bcbc bccc bccm bcec bcet bctc bebb bebe beeb beem beet beme betc bete bett bmce bmtc btcc btec bttb cbbc cbcc cbce cbcm cbct cbec cbee cbet cbme cbtc ccbc cccb cccc cccm ccee ccmb ccmc ccmm cctb cctc cctt cec- cece cecm cect ceeb ceec ceem cemb ceme cemm cet- cete cmbc cmcc cmec cmmb cmmc cmtc ctec ebbc ebcc ecbc ecbe eccb eccc ecce eccm ecct ecem ect- ectc eeee eetc eete embe emcc emet emme emte etbc etcc etec etee etem ette mcbc mccc mcmc mcmt mctc mebe mec- mecc mece meem meet memc meme met- mete mett mmcc mmcm mmct mmmc mmmm mtbc tbcb tbcc tbce tccc tctc tect teec teem teet teme tete tett tmbc tmcc tmcm tmtt ttbb tttt