b-u bbb bbk bbm bbn bbo bbr bbs bbu bkb bkk bkm bkn bko bkr bks bmb bmk bmm bmn bmo bmr bms bmu bnb bnk bnn bno bnr bns bnu bob bok bom bon boo bor bos bou brb brk brm brn bro brr brs bru bsb bsk bsm bsn bso bsr bss bsu bub buk bum bun buo bur bus buu kbb kbk kbm kbn kbo kbr kbs kbu kkb kkk kkm kkn kkr kks kku kmb kmk kmm kmo kms kmu kn- knk knm knn kno knr knu kob kok kom kon koo kor kos kou krk krn kro krr krs kru ksb ksk ksm ksn kso ksr kss ksu kub kuk kum kun kur kus kuu m-o m-r mbb mbk mbm mbo mbr mbs mbu mkb mkk mkm mkn mko mkr mks mku mmb mmk mmm mmn mmo mmr mms mmu mnb mnk mnm mnn mno mnr mns mnu mob mok mom mon moo mor mos mou mrb mrk mrm mrn mro mrr mrs mru msb msk msm msn mso msr mss msu mub muk mum mun mur mus muu nbb nbk nbm nbn nbo nbr nbs nbu nkk nkm nkn nko nkr nks nku nmb nmk nmm nmn nmo nmr nms nmu nnb nnk nnm nnn nno nns nnu no- nob nok nom non noo nor nos nou nrb nrk nrm nrn nro nrr nrs nru nsb nsk nsm nsn nso nsr nss nsu nub nuk num nun nuo nur nus nuu ob- obb obk obm obn obo obr obs obu okb okk oko okr oks oku om- omb omm omn omo omr oms omu on- onb onk onn ono onr ons onu oo- oob ook oom oon ooo oor oos or- orb ork orm orn oro orr ors oru os- osb osk osm osn oso osr oss osu ou- ouk oum oun ouo our ous rbb rbk rbm rbn rbo rbr rbs rbu rkb rkk rkm rko rks rku rmb rmm rmn rmo rmr rms rnb rnm rnn rno rnr rns rnu rob rok rom ron roo ror ros rou rrb rrk rrm rrn rrr rrs rru rsb rsk rsm rsn rso rsr rss rsu rub ruk rum run ruo rur rus ruu sbb sbk sbm sbn sbo sbr sbs sbu sk- skb skk skm sko skr sks sku smb smk smm smn smo smr sms smu snb snk snm snn sno snr sns snu sob sok som son soo sor sos sou sr- srb srk srm srn sro srr srs ss- ssb ssk ssm ssn sso ssr sss ssu sub suk sum sun suo sur sus suu ubb ubk ubn ubo ubr ubs ubu ukb ukk ukn ukr uku um- umb umm umn umo umr ums umu un- unb unk unm unn uno unr uns unu uob uok uom uon uoo uor uos ur- urb urk urm urn uro urr urs uru usb usk usm usn uso usr uss usu uum uun uur uus uuu

-ous bbbb bbbs bmus bnor bnrr bnss bobb bobo bobs bobu bokn boko boks boku bomb boms bomu bonk bonn bono bons bonu boob book boom boon boor boos bor- bork borm born boro borr bors boru bosk bosm bosn boso boss bosu bouk boum boun bour bous brkb brno brns brob brok brom bron broo bror bros brou brrm brrr brrs brsb brsr brum brun brus bsms bsns bson bsos bsrm bssm bubb bubo bubs bubu bukk buko buku bum- bumb bums bunb bunk bunn buno buns bunu buon bur- burb burk burm burn buro burr burs buru busk buss busu buus k-os kbbb kbbk kbbm kbbo kbbr kbbs kbbu kbkb kbkk kbko kbkr kbmb kbmo kbmr kbms kbnn kbno kbnr kbnu kbob kbok kbon kboo kbos kbrb kbrk kbrn kbro kbru kbsb kbsk kbsm kbsn kbso kbsr kbss kbsu kbub kbuk kbun kbur kbus kbuu kkbb kkbn kkbo kkbr kkbs kkkk kkmk kkmo kkmr kkms kknb kknm kknn kkno kkns kknu kkob kkon kkoo kkor kkrb kkrk kkrn kkro kkrr kkrs kksm kksn kksr kkss kksu kkus kkuu kmbr kmbs kmkk kmko kmks kmmk kmmm kmmo kmmr kmms kmnb kmnr kmns kmob kmok kmom kmon kmor kmou kmrb kmrn kmro kmrr kmrs kmsb kmso kmsr kmss kmsu kmun kmur kmus knbb knbn knbr knbu knkk knmb knnb knnk knnr knns knob knok knom knon knor knou knrb knrk knro knrs knsb knsk knsm knsn knso knsr knss knsu knub knuk knur knus kobb kobk kobn kobo kobr kobs kobu kokb kokk kokn koko kokr koks koku komb komo komr koms konk kono koob kook koon kooo koor koos koou korb kork korn koro korr kors koru kos- kosb koso kosr koss kosu koub koum kour kous kouu krbb krbk krbm krbr krkk krkn krko krkr krks krku krmb krmn krmo krmr krms krnb krnk krnm krnn krno krnu krob krok krom kroo kror kros krrb krrk krrm krrn krro krrr krrs krsk krsn krsr krss krsu kruk krum krun krur ksbn ksbr ksbs kskb kskk kskn ksko kskr ksks ksku ksmb ksmm ksmn ksmo ksmr ksms ksmu ksnb ksnk ksnm ksnn ksnr ksns ksob ksok ksom kson ksoo ksor ksos ksou ksrb ksrm ksrn ksro ksrr ksrs kssm kssn ksso kssr ksss kssu ksub ksum ksun ksuu kubb kubo kubr kubs kubu kukk kukn kuks kuku kumm kumo kumr kumu kunk kunm kuno kunr kuns kunu kuok kuon kuoo kuos kurb kurk kurm kuro kurr kurs kuru kusb kusn kuso kusu kuub kuuk kuur kuuu mbbs mbms mbou mbrs mbus mkks mknk mksm mmmm mmms mmor mmsu mmun mmus mnbb mnos mobb mobo mobs moko momo moms momu mon- monk monn mono mons monu moob mook moon moor moos morb mork morn moro mors moru mosk moso moss mosu mouk moun mour mous mrbb mrbm mrbs mrkr mron mruk msmb msmm msms msmu mson msor msrb mssm mssr msun msus mubo mubs muko mumm mumo mums mumu munk munn muno muns munu muon muos murk murn muro murr murs muru musk muso muss musu nbbo nkok