bbbb bbbs bbrc bcbc bcbs bccc bccs bcor bcos bcoz bcrs bcsc bcss bobb bobo bobs bock boco bocs boko boks boob booc book boor boos booz bor- bork boro borr bors borz bosc bosk boso boss bozo brcb brkb brob broc brok broo bror bros broz brrr brrs brsb brsr bscs bsos bssc bzrk bzzz c-bo cbbc cbbs cbcc cbcr cbcs cbko cbkr cbsc ccbc cccb cccc cccs ccob ccoc ccrc ccrs ccss ckbc ckck ckco ckcs ckob ckoc ckoo ckor ckos ckrc cksb ckso cobb cobo cobs cock coco cok- coko coob cook coos cor- corb corc cork coro corr cors cosc coso coss cozz crbc crcc crcr crcz crkc crob croc crok croo cror croz crss cscb cscc csco cscr cscs csks csob csor csos csrc csrs cssr k-os kbbb kbbc kbbk kbbo kbbr kbbs kbbz kbcb kbck kbco kbcr kbcs kbcz kbkb kbkk kbko kbkr kbkz kbob kboc kbok kboo kbos kboz kbrb kbrc kbrk kbro kbrz kbsb kbsk kbso kbsr kbss kbsz kbzc kbzo kbzs kbzz kcbc kcbk kcbr kcbs kccb kccc kcck kccr kckc kckk kcko kckr kckz kcob kcor kcos kcoz kcrc kcro kcrr kcrs kcrz kcsb kcsc kcsr kcss kczo kczz kkbb kkbo kkbr kkbs kkbz kkcb kkck kkco kkcr kkcs kkkk kkob kkoo kkor kkoz kkrb kkrc kkrk kkro kkrr kkrs kkrz kksr kkss kkzz kobb kobc kobk kobo kobr kobs kocb kock kocs kokb kokc kokk koko kokr koks kokz koob kooc kook kooo koor koos kooz korb korc kork koro korr kors kos- kosb kosc koso kosr koss kosz kozb kozk kozo kozr krbb krbk krbr krbz krcb krcc krco krcs krkc krkk krko krkr krks krkz krob kroc krok kroo kror kros kroz krrb krrc krrk krro krrr krrs krrz krsc krsk krsr krss krzk krzr krzs krzz ksbc ksbr ksbs ksbz kscb ksck ksco kscr kscs kskb kskk ksko kskr ksks kskz ksob ksoc ksok ksoo ksor ksos ksrb ksro ksrr ksrs ksrz ksso kssr ksss kssz kszr kzbb kzbk kzbr kzbs kzbz kzcr kzkr kzks kzkz kzoo kzor kzoz kzrb kzrc kzrk kzro kzrr kzrs kzrz kzsb kzsc kzzb kzzk kzzo kzzr kzzs kzzz obbo obkb obok obor obos obro obsr obss ocbc occc ocks ocos ocro ocrr ocrs okko okok okor okro okso oocr oooo ooos orbb orbo orbs orco orcs orko oro- orok oror oros oroz orro orrs orsk orso orzk orzo oscc osco osoo osor osos osro ossb osso rbbb rbbr rbbs rbss rcbc rcbo rccb rccc rccs rcos rcsc rcss rkos rkss rob- robb robo robs rocc rock roco rocs rokk roko rokr roks roob rook roor roos rooz rorc rork roro rosc roso ross rozz rrrr rscc rscs rsos s-os sbbs sbcc sbcs sbor sbrk sccc sccs sck- scob scok scoo scor scr- scrc scrs scsc scso scsr skor skss sobo sobr sobs sock soco socr socs sokk soko sook soor soos sorb soro sorr sors soso soss soz- srbc srcc sros ssbr sscc sscs ssoc ssrc ssrs sssb sssc ssss szob szoc szss z-ro zobo zoco zoo- zook zoos zorb zorc zork zoro zors zoso zoss zozo zsss zzzs zzzz