bbbb bbbs bblb bbls bcbc bcbs bccc bccl bccs bcos bcsc bcsl bcss bctc bcts blbt blls blob bloc bloo blot blss blst blts bobb bobo bobs boco bocs boll bolo bols bolt boob booc bool boos boot bosc boso boss bost botb boto bots bott bscs bslc bsos bssc bsts btcc btcl btcs btob btss bttb c-bo cbbc cbbs cbcc cbcl cbcs cbct cblb cblc cbol cbot cbsc cbtc cbtl ccbc cccb cccc cccl cccs cclc ccls ccob ccoc ccsl ccss ccst cctb cctc cctl cctt clob cloo clos clot clsc cltb cltc clts cobb cobo cobs coco coct col- colb coll colo cols colt coob cool coos coot cosc cosl coso coss cost cotb cotc coto cots cott cscb cscc cscl csco cscs csob csos csot cstc csto csts ctbs ctls ctol ctos ctot ctsc ctss ctts lbcc lbos lbsc lcbc lccc lccs lcls lcsc lctl lcto lcts llbs llcc llcs lllc llll lloc lloo lob- lobb lobo lobs locc loco locs loll lolo lols loob looc lool loos loot losc loso loss lost lotl loto lots lott lscb lsco lscs lsso lsts ltbl ltcc ltcs lttc obbo obls obol obos obot obss obst obts ocbc occc occt oclc ocos oct- octo octs olbo olcc ollo olos olot olst oolo oooo ooos oost ootb oots oscc oscl osco oslo osoo osos ossb osso ostc osts otbs otcl oto- otoo otos otso otto otts s-os sbbs sbcc sbcs sbct sbot sbst sbtc sccc sccl sccs scct scl- sclc scls scob scol scoo scot scsc scsl scso scst sctc sctl scto scts slcc slob sloc sloo slos slot slsc slst slts sobo sobs sobt socl soco socs soll solo sols solt sool soos soot soso soss sost sotc sotl soto sots sscc sscs sslc sslt ssoc ssot sssb sssc ssss sstb sstc sstl ssts stbc stbs stcc stcs stlc stlo stlt stob stol stoo stos stot stss sttc tbbs tbcb tbcc tbst tcbs tccc tcos tctc tcts tlco tlos tobo tobs tobt toco tol- toll tolo tolt tool toos toot tosb tosc toso toss tost totc toto tots tott tsbc tscc tsob tsol tsos tsst tstc tsts ttbb ttss tttt