b-u bbb bbd bbf bbn bbo bbr bbu bdb bdd bdf bdo bdr bdu bfb bfd bff bfn bfo bfr bfu bnb bnd bnf bnn bno bnr bnu bob bod bof bon boo bor bou brb brd brf brn bro brr bru bub bud buf bun buo bur buu dbb dbd dbf dbn dbo dbr dbu ddb ddd ddf ddn ddo ddr ddu dfb dfd dff dfn dfo dfr dfu dnb dnd dnf dnn dno dnr dob dod dof don doo dor dou drb drd drn dro drr dru dub dud duf dun duo dur fbb fbd fbf fbn fbo fbr fbu fdb fdd fdf fdn fdo fdr fdu ffd fff ffn ffo ffr ffu fnb fnd fnf fnn fnr fnu fob fof fon foo for fou frb frd frf frn fro frr fru fub fud fuf fun fuo fur fuu nbb nbd nbf nbn nbo nbr nbu ndb ndd ndf ndn ndo ndr ndu nfb nfd nff nfn nfo nfr nfu nnb nnf nnn nno nnu no- nob nod nof non noo nor nou nrb nrd nrf nrn nro nrr nru nub nud nun nuo nur nuu ob- obb obd obf obn obo obr obu odb odd odf odn odo odr odu of- ofb ofd off ofn ofo ofr ofu on- onb ond onf onn ono onr onu oo- oob ood oof oon ooo oor or- orb ord orf orn oro orr oru ou- oud ouf oun ouo our rbb rbd rbf rbn rbo rbr rbu rdb rdd rdf rdn rdo rdr rdu rfb rfd rff rfn rfo rfr rfu rnb rnd rnn rno rnr rnu rob rod rof ron roo ror rou rrb rrd rrf rrn rrr rru rub rud ruf run ruo rur ruu ubb ubf ubn ubo ubr ubu udb udd udf udn udo udr udu ufd uff ufn ufo ufr ufu un- unb und unf unn uno unr unu uob uod uon uoo uor ur- urb urd urf urn uro urr uru uun uur uuu

bbbb bbdd bbdo bbfn bd-r bduf bnor bnrr bobb bobo bobu bodb bodo bodu bofd boff bofu bond bonn bono bonu boob bood boof boon boor bor- bord borf born boro borr boru boud bouf boun bour brdo brfu brno brob brod bron broo bror brou brrr brud brun bubb bubo bubu budb budd budo budu buff bufo bufr bunb bund bunn buno bunu buon bur- burb burd burn buro burr buru d-bo dbfo dbrn dddd ddub dfrf dobb dobu dod- dodd dodo doff dond donn dono donr doob dood doof doon door dord dorf dorn doro dorr doru doub doud douf doun dour drno drob drod drof dron drou drub druu dub- dubb dubu dudd dudo dudu duff dufu dunn duno duo- duon durn duro duru duur ffff ffrr ffun fndd fndn fndr fnuf fofo fond fono food foof foon for- forb ford forn foro forr foud foun four frob fron frou frub frun fubb fubu fudd fuff fufu fund funf fuor fur- furn furo furr nbbo nbuf nddb nddo ndor ndrf nfff nfon nndb nnnn nobo nobu nodo nodu non- nonn nono nonu noo- noob noon nooo noor nor- norb nord norf norn noro norr noun nour nron nrrd nudd nudo nuff nunn nuno nuon nurd nurn nurr nuru obbo obon obor obro odbo oddd odnb odon odoo odor odou odur ofdr off- offo offr offu ofno ofor ondo onno onod onon onor onur ooff oooo oord orbb orbo orbu ordn ordo ordu orff orfu orno oro- orof oron oror orro orub ouff oun- ound our- ourn ouro ouu- rbbb rbbr rnbr rndf rnod rob- robb robo robu rodd rodo roff rofo rond rono roob rood roof roon roor roro roru roub roud rouf roun rrrr rrun rubb rubu rudd rudo ruff rufo rund runf runn runo rurd ruro ruru ruud ruun ubbo ubod ubon ubud udon udoo udun unbd undo unfd unno unon unrf unro uofo uor- urdu urff uro- uroo urun urur uuno uuuu

bdoor bo-bo bobr bodd- bodor boffo bondo bonon bonou bonud boond boord boorn booru borbo bordo born- borno bornu boro- borod boron boroo borou borro borun boudu bound bourd bourn brobo brodd brodo brond bronn brood broon broud broun brrrr brud- bruff brunn bruno bruun bubon buddu budur buffo bundu bunud bunun buono buord burn- buron buroo burro burru burud burun d-rod ddddd do-do dobro dodon dodoo dodro dofor dondo donon donor doodo doorn dorff dorno doron dorud doufu douro drbob drobo droff drood droof droon droun dubbo dubno dubon duddo dudon dudou dufur dundo dunno dunod dunun durno duron fnord fodor fondo fondu foodb foord ford- fordo forno forro forud forur found fourb fourd fouro frodo frond frood frorn froud fu-fu fuddu fund- fundo fundu fuorn furbo furo- furor furud fuudo ndour nduru nnooo no-do no-no nobob nobuo nodof nofor nofou nofun non-u nondo nonno noonu noord norbu nordo noron norro norun nroff nu-nu nudur nunon nunun nuodb nuoro nurun o-bon o-r-b obodo oboro obudu oddur odour odudu oduro offof offon offun ofnod ofono oforn ofour onoff onond onoon onorn onour ooooo ordon ordro orfor ornon orobo orodo orono oruro oudon ouoro ourno ro-ro robbo robo- robon robor robun robur rodbo rodon rodor rofor rondo ronno roodu roond rorbu round rubof rubon rubor rudno ruffo rufo- rundu runo- runof runon u-dub ubobo ufofu uforb ufund unbud undub undun undur unfun unfur unnun unnur unoor unorn unrun unurn uroob urour urubu uuuuu

bbbbbb bobrun bonbon bondon bonnor bonobo booboo borbon borbor bordon bordun bornof bornon bororo boubou boudon boudou bounou bourou brodno bronno brubru brudno bruron buborn bububu buffon buford bundoo burbur burdon burdur burnou dobron dobrun dododo dondon donoor donour dorbod dordon dorobo dorond dorood dororo doudou dourou dubdub duddon dufour dundun dundur dunoon dunord foboff fondof fondon foofoo foofur forbod forbon fordon forfun foufou fourof fourou frbroo funoon funorb funrun furfur furour furrfu furuno nnundu noboru nodoff nofood noforn non-no nonodd nonono nonoon noonoo noonor noroff noroof nounou obudno odoorn of-run ofdoor offord on-off oooooo oordoo ordoru orford orrour ourdon