bbbb bblb bcbc bccc bccl bctc blbt blkb blob bloc blok bloo blot bobb bobo bock boco boko bolk boll bolo bolt boob booc book bool boot botb boto bott btcc btcl btob bttb c-bo cbbc cbcc cbcl cbct cbkl cbko cblb cblc cbol cbot cbtc cbtl ccbc cccb cccc cccl cclc ccob ccoc cctb cctc cctl cctt ckbc ckck ckcl ckco ckob ckoc ckoo ckot cktb clob clok cloo clot cltb cltc cobb cobo cock coco coct cok- coko col- colb colk coll colo colt coob cook cool coot cotb cotc coto cott ctol ctot k-lo kbbb kbbc kbbk kbbl kbbo kbbt kbcb kbck kbcl kbco kbct kbkb kbkk kbkl kbko kblb kbll kblo kblt kbob kboc kbok kboo kbot kbtb kbtc kbtk kbtl kbto kbtt kcbc kcbk kcbl kccb kccc kcck kccl kcct kckc kckk kckl kcko kclc kclk kcll kclt kcob kcol kcot kctb kctc kcto kkbb kkbl kkbo kkbt kkcb kkck kkcl kkco kkct kkkk kklb kklc kkll kklo kkob kkol kkoo kkot kktc kktk kktl klbb klbc klbl klbt klcb klcc klck klcl klkc klkk klkl klko kllb kllc kllk klob kloc klok klol kloo kltc kltk klto kltt kobb kobc kobk kobo kocb kock koct kokb kokc kokk koko kolb kolc kolk koll kolo kolt koob kooc kook kool kooo koot kotb kotc kotk koto kott ktbb ktbc ktbl ktbt ktcc ktck ktcl ktco ktkb ktkc ktkk ktko ktkt ktlb ktlk ktlo ktlt ktob ktoc ktok ktoo ktot kttc kttk ktto kttt lbcc lcbc lccc lctl lcto llcc lllc llll lloc lloo lob- lobb lobo locc lock loco lokk loko loll lolo loob looc look lool loot lotl loto lott ltbl ltcc lttc obbo obkb obok obol obot ocbc occc occt oclc oct- octo okko oklo okok okol okot okto olbo olcc ollo olot oolo oooo ootb otcl oto- otok otoo otto tbcb tbcc tccc tctc tkol tlco tobo tobt tock toco toko tol- tolk toll tolo tolt took tool toot totc toto tott ttbb tttt