bbbb bbbs bbcm bcbc bcbs bccc bccm bccs bcms bcos bcsc bcsm bcss bctc bcts bmoc bmtc bmts bobb bobo bobs bocm boco bocs bomb boms bomt boob booc boom boos boot bosc bosm boso boss bost botb boto bots bott bscs bsms bsmt bsos bssc bssm bsts btcc btcs btob btss bttb c-bo cbbc cbbs cbcc cbcm cbcs cbct cbms cbot cbsc cbsm cbtc ccbc cccb cccc cccm cccs ccmb ccmc ccmm ccms ccob ccoc ccom ccss ccst cctb cctc cctt cmbc cmbs cmcc cmcs cmmb cmmc cmms cmoc cmos cmot cmsc cmst cmtc cobb cobo cobs coco coct com- comb comc comm como coms coob coom coos coot cosc cosm coso coss cost cotb cotc coto cots cott csbm cscb cscc csco cscs csmc csob csom csos csot cssm cstc cstm csto csts ctbs ctmo ctos ctot ctsc ctss ctts mbbs mbcs mbms mcbc mccc mcmc mcmt mcot mcss mcst mctc mcts mmcc mmcm mmcs mmct mmmc mmmm mmms mmsc mmst mmts mobb mobo mobs moco mocs momo moms moob mooc moos moot mosc moso moss most motb motm moto mots mott mscc msco msmb msmc msmm msms mssm msst mstc msts mtbc mtbo mtbs mtom mtss mtst mtts obbo obos obot obss obst obts ocbc occc occt ocms ocom ocos oct- octo octs ombo omo- omoo ooms oooo ooos oost ootb oots oscc osco osm- osmo osoo osos ossb osso ostc osts otbs oto- otoo otos otso otto otts s-os sbbs sbcc sbcs sbct sbmc sbot sbst sbtc sccc sccm sccs scct scmc scmm scmo scms scob scom scoo scot scsc scso scst sctc scto scts smbc smcc smoc smos smot smsc smss smtc sobo sobs sobt socm soco socs somb somm somo soom soos soot soso soss sost sotc sotm soto sots sscc sscs ssmc ssoc ssot sssb sssc sssm ssss sstb sstc ssts stbc stbs stcc stcs stmc stms stmt stob stom stoo stos stot stsm stss sttc t-mo tbbs tbcb tbcc tbst tcbs tccc tcom tcos tctc tcts tmbc tmcc tmcm tmos tmsc tmtt tobo tobs tobt toco tomb tomm tomo toms tomt toom toos toot tosb tosc toso toss tost totc totm toto tots tott tsbc tscc tsmc tsob tsom tsos tssm tsst tstc tstm tsts ttbb ttms ttss tttt