b-u bbb bbk bbm bbn bbr bbu bby bkb bkk bkm bkn bkr bmb bmk bmm bmn bmr bmu bnb bnk bnn bnr bnu brb brk brm brn brr bru bry bub buk bum bun bur buu buy by- byk bym byn byr byu kbb kbk kbm kbn kbr kbu kkb kkk kkm kkn kkr kku kky kmb kmk kmm kmu kn- knk knm knn knr knu krk krn krr kru kry kub kuk kum kun kur kuu kuy kym kyn kyr kyu m-r mbb mbk mbm mbr mbu mkb mkk mkm mkn mkr mku mky mmb mmk mmm mmn mmr mmu mnb mnk mnm mnn mnr mnu mrb mrk mrm mrn mrr mru mry mub muk mum mun mur muu muy my- myb myk mym myn myr myu nbb nbk nbm nbn nbr nbu nkk nkm nkn nkr nku nky nmb nmk nmm nmn nmr nmu nnb nnk nnm nnn nnu nrb nrk nrm nrn nrr nru nry nub nuk num nun nur nuu nuy nyk nym nyn nyu nyy rbb rbk rbm rbn rbr rbu rkb rkk rkm rku rky rmb rmm rmn rmr rnb rnm rnn rnr rnu rny rrb rrk rrm rrn rrr rru rub ruk rum run rur ruu ruy ry- ryk rym ryn ryr ryu ryy ubb ubk ubn ubr ubu uby ukb ukk ukn ukr uku um- umb umm umn umr umu un- unb unk unm unn unr unu uny ur- urb urk urm urn urr uru ury uum uun uur uuu uyu ybm ybr yby ykk ykm ykn ymm ynk ynn ynu yny yrn yru yuk yum yun yur yuu yuy yyb yyu yyy