b-u bbb bbf bbn bbo bbr bbt bbu bfb bff bfn bfo bfr bft bfu bnb bnf bnn bno bnr bnt bnu bob bof bon boo bor bot bou brb brf brn bro brr brt bru btb btf btn bto btr btt btu bub buf bun buo bur but buu fbb fbf fbn fbo fbr fbt fbu fff ffn ffo ffr fft ffu fnb fnf fnn fnr fnt fnu fob fof fon foo for fot fou frb frf frn fro frr frt fru ftb ftf ftn fto ftr ftt ftu fub fuf fun fuo fur fut fuu nbb nbf nbn nbo nbr nbt nbu nfb nff nfn nfo nfr nft nfu nnb nnf nnn nno nnt nnu no- nob nof non noo nor not nou nrb nrf nrn nro nrr nrt nru ntb ntf ntn nto ntr ntt ntu nub nun nuo nur nut nuu ob- obb obf obn obo obr obt obu of- ofb off ofn ofo ofr oft ofu on- onb onf onn ono onr ont onu oo- oob oof oon ooo oor oot or- orb orf orn oro orr ort oru ot- otb otf otn oto otr ott otu ou- ouf oun ouo our out rbb rbf rbn rbo rbr rbt rbu rfb rff rfn rfo rfr rft rfu rnb rnn rno rnr rnt rnu rob rof ron roo ror rot rou rrb rrf rrn rrr rrt rru rtb rtf rtn rto rtr rtt rtu rub ruf run ruo rur rut ruu tbb tbf tbn tbo tbr tbt tbu tfb tff tfn tfo tfr tft tfu tnb tnf tnn tno tnr tnt to- tob tof ton too tor tot tou trb trf trn tro trr trt tru ttb ttf ttn tto ttr ttt ttu tub tuf tun tuo tur tut tuu ubb ubf ubn ubo ubr ubt ubu uff ufn ufo ufr uft ufu un- unb unf unn uno unr unt unu uob uon uoo uor uot ur- urb urf urn uro urr urt uru utb utf utn uto utr utt utu uun uur uut uuu

bbbb bbfn bftt bnor bnrr bobb bobo bobu boff bofu bonn bono bont bonu boob boof boon boor boot bor- borf born boro borr bort boru botb botn boto bott bouf boun bour bout brfu brno brob bron broo bror brot brou brrr brun brut btob btor btrt bttb bubb bubo bubu buff bufo bufr bunb bunn buno bunt bunu buon bur- burb burn buro burr burt buru but- buto butt ffff ffrr fftf ffun fntb fnuf fobt fofo fono font foof foon foot for- forb forn foro forr fort foto fott foun four fout frob fron frot frou frub frun ftub fubb fubu fuff fufu funf funt fuor fur- furn furo furr furt futo futu nbbo nbuf nfff nfon nfto nnnn nnot nntn nobo nobu non- nonn nono nont nonu noo- noob noon nooo noor noot nor- norb norf norn noro norr nort not- noto nott noun nour nout nron ntnu ntof ntru ntto nttr nuff nunn nuno nunt nuon nurn nurr nurt nuru nutt nutu obbo obon obor obot obro off- offo offr offu ofno ofor onno onon onor ont- onto onur onut ooff oont oooo oort ootb orbb orbo orbu orff orfu orno oro- orof oron oror orot orro orto orub oto- otof oton otoo otor otro otto ottu otur ouff oun- our- ourn ouro ourt out- outb outo ouu- rbbb rbbr rnbr rnnt rnot rnut rob- robb robo robt robu roff rofo rono ront roob roof roon roor root roro rort roru rotn roto rotr rott roub rouf roun rout rrrr rrun rtbf rtfb rubb rubu ruff rufo ruft runf runn runo runt ruro ruru ruto rutt rutu ruun tbnf tbrb tfot tnut tobo tobt tobu toff tofo toft tofu tonb tonn tono tonu toof toon toor toot torf torn toro torr tort toru toto totr tott toun tour tout trfr trno tron troo trot trou trtr trub trun trut truu ttbb ttff ttfn tton tttt tubb tubo tubr tubu tuff tufo tuft tufu tunb tunn tuno tunu tuor turb turf turn turo turr turt turu tuto tutt tutu tuuo ubbo ubon ubtf unno unon unrf unro untb unto unut uofo uor- urff urft uro- uroo urun urur urut utfo utor utto uttu uuno uutf uuuu

bo-bo bobr boffo bonon bonou bonut boont boorn boort booru borbo born- borno bornt bornu boro- boron boroo borot borou borro borun borut boton botou botro bottu botun bourn bouto brobo broft bronn bront broon broto broun brout brrrr bruff brunn bruno brunt bruun btr-t btron bubon buffo bunun bunut buono burn- burnt buron buroo burro burru burtt burun burut butno buto- buton butor butot butou butuo butut forno forro forto forur foton fotur fount fourb fouro front froot frorn frunt fruto ftrtt fu-fu fuorn furbo furo- furor futon futur nnooo no-no nobob nobuo nobut nofor nofou nofun nofut non-u nonno nonot noonu noort norbu noron norro nortt norun notno noto- notof noton notto nourt nroff ntoro nu-nu nunon nunun nuoro nurun nuton o-bon o-r-b oboro obout offof offon offto offun ofono oforn ofoto ofour onoff onont onoon onorn onoto onour onout onto- ontof ontoo ontur ooooo orbot orfor ornon ornot orobo orono orout orton ortoo oruro orutu otono ototo otour ottur oubut ouoro ourno outof outon outro outto ro-ro robbo robo- robon robor robot robrt robun robur rofor ronno ronto rooft rorbu roto- roton rotor rotot rotto rotun roubt rount routt rubof rubon rubor ruffo rufo- runo- runof runon runto ruutu t-nut tbtbt tbutt tntnt tobon tobor tobot tobou toffo tofor tonbu tono- tonof tonto torob toron torro torto tortu torun toto- toton totoo tourn touro troff troft trono troon trott trout trubu truff truro ttttt tubo- tubof tubon tubou tunon tuotu turbo turbt turn- turno turnt turnu turon turot turro turtu turut tutor tutto tutun tuuru ubobo ufofu uforb ufton unfun unfur unnun unnur unnut unoft unoor unorn unrun unurn uroob urour urubu urutu utro- utror uttur uturn uturu ututo uuuuu

bbbbbb bobrun bonbon bonnor bonnot bonnut bonobo bonton