b-u bbb bbf bbn bbo bbr bbs bbu bfb bff bfn bfo bfr bfs bfu bnb bnf bnn bno bnr bns bnu bob bof bon boo bor bos bou brb brf brn bro brr brs bru bsb bsf bsn bso bsr bss bsu bub buf bun buo bur bus buu fbb fbf fbn fbo fbr fbs fbu fff ffn ffo ffr ffs ffu fnb fnf fnn fnr fns fnu fob fof fon foo for fos fou frb frf frn fro frr frs fru fsb fsf fsn fso fsr fss fsu fub fuf fun fuo fur fus fuu nbb nbf nbn nbo nbr nbs nbu nfb nff nfn nfo nfr nfs nfu nnb nnf nnn nno nns nnu no- nob nof non noo nor nos nou nrb nrf nrn nro nrr nrs nru nsb nsf nsn nso nsr nss nsu nub nun nuo nur nus nuu ob- obb obf obn obo obr obs obu of- ofb off ofn ofo ofr ofs ofu on- onb onf onn ono onr ons onu oo- oob oof oon ooo oor oos or- orb orf orn oro orr ors oru os- osb osf osn oso osr oss osu ou- ouf oun ouo our ous rbb rbf rbn rbo rbr rbs rbu rfb rff rfn rfo rfr rfs rfu rnb rnn rno rnr rns rnu rob rof ron roo ror ros rou rrb rrf rrn rrr rrs rru rsb rsf rsn rso rsr rss rsu rub ruf run ruo rur rus ruu sbb sbf sbn sbo sbr sbs sbu sfb sff sfn sfo sfr sfs sfu snb snf snn sno snr sns snu sob sof son soo sor sos sou sr- srb srf srn sro srr srs ss- ssb ssf ssn sso ssr sss ssu sub suf sun suo sur sus suu ubb ubf ubn ubo ubr ubs ubu uff ufn ufo ufr ufs ufu un- unb unf unn uno unr uns unu uob uon uoo uor uos ur- urb urf urn uro urr urs uru usb usf usn uso usr uss usu uun uur uus uuu

-ous bbbb bbbs bbfn bffs bfsr bnor bnrr bnss bobb bobo bobs bobu boff bofs bofu bonn bono bons bonu boob boof boon boor boos bor- borf born boro borr bors boru bosn boso boss bosu bouf boun bour bous brfu brno brns brob bron broo bror bros brou brrr brrs brsb brsr brun brus bsff bsfs bsns bson bsos bubb bubo bubs bubu buff bufo bufr bunb bunn buno buns bunu buon bur- burb burn buro burr burs buru buss busu buus fbrs fbus ffff ffrr ffss ffun fnrs fnuf fobs fofo fono fons foof foon foos for- forb forn foro forr fors fosb foso foss foun four fous frns frob fron fros frou frsb frso frub frun fsfo fssf fubb fubs fubu fuff fufu funf funs fuor fur- furn furo furr furs fuso fuss fusu nbbo nbuf nfff nfon nfrs nfsr nfsu nnnn nnos nnss nobo nobs nobu non- nonn nono nons nonu noo- noob noon nooo noor noos nor- norb norf norn noro norr nors nos- noss nosu noun nour nous nron nsbo nsfs nsnr nsof nsos nsou nssb nssf nsso nssr nsss nsub nubs nuff nunn nuno nuns nuon nurn nurr nurs nuru nuss nusu obbo obon obor obos obro obsn obsr obss obus off- offo offr offs offu ofno ofor ofus onno onon onor onos onso onur onus ooff oofs oons oooo ooos oous orbb orbo orbs orbu orff orfs orfu orno orns oro- orof oron oror oros orro orrs orso orsu orub orus osno osnr osoo osor osos osro ossb osso ossu osun oubs ouff oun- our- ourn ouro ours ouu- rbbb rbbr rbbs rbss rnbr rob- robb robo robs robu roff rofo rono rons roob roof roon roor roos roro roru roso ross roub rouf roun rous rrrr rrun rsnn rsno rsnr rsos rubb rubs rubu ruff rufo runf runn runo runs ruro rurs ruru ruso russ rusu ruun s-os sbbs sbor sbus sfnb sfor sfos sfro sfss sfsu snfu snns snob snoo snor snos snrs snub snur snus sobo sobr sobs sobu sofo son- sono sons sonu soof soon soor soos sorb sorn soro sorr sors soru soso soss souf soun sour sous srnn srno sros srub ssbn ssbr ssns ssrs sssb sssf ssss sub- subb subo subs suf- suff sufr sufs sufu sun- sunb sunn suno suns sunu suor suos sur- surf surn suro surr surs suru sus- suso suss susu suus ubbo ubon ubos ufos unno unns unon unos unrf unro unrs uns- unso unus uofo uor- urbs urff urns uro- uroo urso urss ursu urun urur urus usbr usbs usfs usno usnr usnu usos ussb ussf ussr usss ussu usun usus uuno uuuu

bbuss bo-bo bobos bobr boffo boffs bonon bonos bonou bonsu bonus boobs boofs boons boorn boors booru borbo born- borno borns bornu boro- boron boroo boros borou borro borsu borun borus bosns boson bosor bosso bosun bourn bours brobo brobs bronn brons broon broos bross broun brous brrrr bruff brunn bruno bruns bruss bruun bsous bubon buffo buffs bufos bunso bunun bunus buono burbs burn- burns buron buroo buros burro burrs burru burun burus busno buson busso bussu busur busuu fofos fonos fonso foons forbs forno foros forro forso forss forur forus fosun fourb fouro fours frobs frons frorn fu-fu fubbs fubus fuffs fuorn furbo furo- furor furrs furus fuso- fuson fusor fusun fusus n-sub nnooo no-no nobbs nobob nobuo nobus nofor nofou nofun non-u nonno nonos nonus noobs noons noonu norbu norns noron norro norun noso- noson nouns nroff nu-nu nubus nunns nunon nunun nuoro nuosu nursu nurun nurus nusus o-bon o-r-b oboro offof offon offun ofono oforn ofosu ofour onoff onoon onorn onour oonus ooooo orbus orfor ornon ornus orobo orono oroso orosu orson orsun oruro ososo ossos ossun ossur osusu ouoro ourno ro-ro robbo robbs robo- robon robor robun robur rofor ronno roofs roons rorbu rosso rosss rosu rouns rsssf rubof rubon rubor rubus ruffo ruffs rufo- rufus runo- runof runon rusor russo