bbbb bftt bobb bobo boff boko boob boof book boor boot bor- borf bork boro borr bort botb boto bott brkb brob brok broo bror brot brrr btob btor btrt bttb f--k ffff ffrr fftf fobt fofo foof fook foot for- forb fork foro forr fort foto fott frob frot kbbb kbbf kbbk kbbo kbbr kbbt kbfb kbff kbfk kbfo kbfr kbft kbkb kbkf kbkk kbko kbkr kbob kbok kboo kbot kbrb kbrf kbrk kbro kbrt kbtb kbtf kbtk kbto kbtr kbtt kfbk kfbt kffb kfff kffk kfkb kfok kfoo kfor kfro kfrr kftk kftt kkbb kkbo kkbr kkbt kkfr kkft kkkk kkob kkoo kkor kkot kkrb kkrf kkrk kkro kkrr kkrt kktk kobb kobk kobo kobr koff kofk kofo koft kokb kokf kokk koko kokr koob kook kooo koor koot korb korf kork koro korr kort kotb kotk koto kotr kott krbb krbk krbr krbt krff krfo krft krkk krko krkr krob krof krok kroo kror krrb krrf krrk krro krrr krrt krtk krto krtr ktbb ktbr ktbt ktfb ktfo ktkb ktkk ktko ktkr ktkt ktob ktok ktoo ktor ktot ktrb ktrf ktrk ktro ktrr ktrt kttf kttk ktto kttr kttt obbo obkb obok obor obot obro off- offo offr ofor okko okok okor okot okro okto ooff oooo oort ootb orbb orbo orff orko oro- orof orok oror orot orro orto oto- otof otok otoo otor otro otto rbbb rbbr rkkf rob- robb robo robt roff rofo rokk roko rokr roob roof rook roor root rork roro rort rotk roto rotr rott rrrr rtbf rtfb tbrb tfot tkof tobo tobt toff tofo toft toko toof took toor toot torf tork toro torr tort toto totr tott trfr troo trot trtr ttbb ttff tttt