b-u bbb bbk bbn bbo bbr bbt bbu bkb bkk bkn bko bkr bkt bnb bnk bnn bno bnr bnt bnu bob bok bon boo bor bot bou brb brk brn bro brr brt bru btb btk btn bto btr btt btu bub buk bun buo bur but buu k-t kbb kbk kbn kbo kbr kbu kkb kkk kkn kkr kkt kku kn- knk knn kno knr knt knu kob kok kon koo kor kot kou krk krn kro krr krt kru ktb ktk ktn kto ktr ktt ktu kub kuk kun kur kut kuu nbb nbk nbn nbo nbr nbt nbu nkk nkn nko nkr nkt nku nnb nnk nnn nno nnt nnu no- nob nok non noo nor not nou nrb nrk nrn nro nrr nrt nru ntb ntk ntn nto ntr ntt ntu nub nuk nun nuo nur nut nuu ob- obb obk obn obo obr obt obu okb okk oko okr oku on- onb onk onn ono onr ont onu oo- oob ook oon ooo oor oot or- orb ork orn oro orr ort oru ot- otb otk otn oto otr ott otu ou- ouk oun ouo our out rbb rbk rbn rbo rbr rbt rbu rkb rkk rko rkt rku rnb rnn rno rnr rnt rnu rob rok ron roo ror rot rou rrb rrk rrn rrr rrt rru rtb rtk rtn rto rtr rtt rtu rub ruk run ruo rur rut ruu tbb tbk tbn tbo tbr tbt tbu tkb tkk tko tkr tkt tnb tnk tnn tno tnr tnt to- tob tok ton too tor tot tou trb trk trn tro trr trt tru ttb ttk ttn tto ttr ttt ttu tub tuk tun tuo tur tut tuu ubb ubk ubn ubo ubr ubt ubu ukb ukk ukn ukr uku un- unb unk unn uno unr unt unu uob uok uon uoo uor uot ur- urb urk urn uro urr urt uru utb utk utn uto utr utt utu uun uur uut uuu

bbbb bnor bnrr bobb bobo bobu bokn boko boku bonk bonn bono bont bonu boob book boon boor boot bor- bork born boro borr bort boru botb botn boto bott bouk boun bour bout brkb brno brob brok bron broo bror brot brou brrr brun brut btob btor btrt bttb bubb bubo bubu bukk buko buku bunb bunk bunn buno bunt bunu buon bur- burb burk burn buro burr burt buru but- buto butt kbbb kbbk kbbo kbbr kbbt kbbu kbkb kbkk kbko kbkr kbnn kbno kbnr kbnu kbob kbok kbon kboo kbot kbrb kbrk kbrn kbro kbrt kbru kbtb kbtk kbtn kbto kbtr kbtt kbub kbuk kbun kbur kbut kbuu kkbb kkbn kkbo kkbr kkbt kkkk kknb kknn kkno kknt kknu kkob kkon kkoo kkor kkot kkrb kkrk kkrn kkro kkrr kkrt kktk kktu kkut kkuu knbb knbn knbr knbt knbu knkk knkt knnb knnk knnr knob knok knon knor knot knou knrb knrk knro kntk kntn knto kntr kntu knub knuk knur knut kobb kobk kobn kobo kobr kobu kokb kokk kokn koko kokr koku konk kono kont koob kook koon kooo koor koot koou korb kork korn koro korr kort koru kotb kotk kotn koto kotr kott kotu koub kour kout kouu krbb krbk krbr krbt krkk krkn krko krkr krku krnb krnk krnn krno krnt krnu krob krok kroo kror krrb krrk krrn krro krrr krrt krtk krtn krto krtr kruk krun krur ktbb ktbn ktbr ktbt ktbu ktkb ktkk ktkn ktko ktkr ktkt ktku ktnk ktnn ktno ktnt ktob ktok kton ktoo ktor ktot ktrb ktrk ktrn ktro ktrr ktrt ktru kttk kttn ktto kttr kttt kttu ktub ktun kubb kubo kubr kubu kukk kukn kuku kunk kuno kunr kunt kunu kuok kuon kuoo kurb kurk kuro kurr kurt kuru kuto kutr kutt kutu kuub kuuk kuur kuuu nbbo nknt nkok nkor nktr nnnn nnot nntn nobo nobu noko non- nonn nono nont nonu noo- noob nook noon nooo noor noot nor- norb nork norn noro norr nort not- noto nott noun nour nout nron ntnu ntru ntto nttr nubk nuku nunk nunn nuno nunt nuon nurn nurr nurt nuru nutt nutu nuuk obbo obkb obok obon obor obot obro okko okno okok okon okor okot okro okto okun okur onno onon onor ont- onto onur onut ooku oont oooo oort ootb orbb orbo orbu orko orno oro- orok oron oror orot orro orto orub oto- otok oton otoo otor otro otto ottu otur oun- our- ourn ouro ourt out- outb outo ouu- rbbb rbbr rnbr rnnt rnot rnut rob- robb robo robt robu rokk roko rokr roku ronk rono ront roob rook roon roor root rork roro rort roru rotk rotn roto rotr rott roub rouk roun rout rrrr rrun rtkn rubb rubu rukk rukn ruku runk runn runo runt ruok ruro ruru ruto rutt rutu ruun tbrb tkon tnut tobo tobt tobu toko toku tonb tonk tonn tono tonu took toon toor toot tork torn toro torr tort toru toto totr tott touk toun tour tout trno tron troo trot trou trtr trub truk trun trut truu ttbb tton tttt tubb tubo tubr tubu tuko tunb tunk tunn tuno tunu tuor turb turk turn turo turr turt turu tuto tutt tutu tuuo ubbo ubon ukko ukok ukon ukur unkn unko unno unon unro untb unto unut uor- uro- urok uroo uruk urun urur urut utor utto uttu uuno uuuu

b-r-k bbook bkorn bo-bo bobko bobok bobr bokko bokok bokor bokun bonon bonou bonut booko boonk boont boorn boort booru borbo borko borku born- borno bornt bornu boro- borok boron boroo borot borou borro borun borut botok boton botou botro bottu botun bouko bourn bouto brobo bronk bronn bront brook broon broto brouk broun brout brrrr brunk brunn bruno brunt bruun btr-t btron bubon bukk- buknu bukor bunko bunuk bunun bunut buono burn- burnt buron buroo burro burru burtt buruk burun burut butko butno buto- buton butor butot butou butuo butut k-rob k-t-b knokk knork knorr knott knout knurr ko-ko kobru kobuk kobun kokko