bbbb bobb bobo boko bomb bomt boob book boom boor boot bor- bork borm boro borr bort botb boto bott brkb brob brok brom broo bror brot brrm brrr btob btor btrt bttb kbbb kbbk kbbm kbbo kbbr kbbt kbkb kbkk kbko kbkr kbmb kbmo kbmr kbmt kbob kbok kboo kbot kbrb kbrk kbro kbrt kbtb kbtk kbtm kbto kbtr kbtt kkbb kkbo kkbr kkbt kkkk kkmk kkmo kkmr kkmt kkob kkoo kkor kkot kkrb kkrk kkro kkrr kkrt kktk kmbr kmkk kmko kmkt kmmk kmmm kmmo kmmr kmmt kmob kmok kmom kmor kmot kmrb kmro kmrr kmtb kmtk kmtr kmtt kobb kobk kobo kobr kokb kokk koko kokr komb komo komr komt koob kook kooo koor koot korb kork koro korr kort kotb kotk kotm koto kotr kott krbb krbk krbm krbr krbt krkk krko krkr krmb krmo krmr krmt krob krok krom kroo kror krrb krrk krrm krro krrr krrt krtk krtm krto krtr ktbb ktbr ktbt ktkb ktkk ktko ktkr ktkt ktmb ktmk ktmm ktmo ktmr ktmt ktob ktok ktoo ktor ktot ktrb ktrk ktrm ktro ktrr ktrt kttk ktto kttr kttt mkto mmmm mmor mobb mobo moko momo moob mook moor moot morb mork moro mort motb motm moto mott mrbb mrbm mrkr mrtm mrtt mtbo mtom mtor mtrr mttr obbo obkb obok obor obot obro okko okmo okok okom okor okot okro okto ombo omo- omoo omor omro oooo oort ootb orbb orbo orko ormo oro- orok orom oror orot orro orto oto- otok otoo otor otro otto rbbb rbbr rbmk rob- robb robo robt rokk roko rokr romb romk romm romo roob rook room roor root rork roro rort rotk roto rotr rott rrkm rrrr t-mo tbrb tmbr tmmk tmro tmtt tobo tobt toko tomb tomm tomo tomt took toom toor toot tork torm toro torr tort totm toto totr tott trmb trmk trom troo trot trtr ttbb tttt