b-u bbb bbk bbn bbt bbu bby bkb bkk bkn bkt bnb bnk bnn bnt bnu btb btk btn btt btu bty bub buk bun but buu buy by- byk byn byt byu k-t kbb kbk kbn kbu kkb kkk kkn kkt kku kky kn- knk knn knt knu ktb ktk ktn ktt ktu kub kuk kun kut kuu kuy kyn kyt kyu nbb nbk nbn nbt nbu nkk nkn nkt nku nky nnb nnk nnn nnt nnu ntb ntk ntn ntt ntu nub nuk nun nut nuu nuy nyk nyn nyt nyu nyy tbb tbk tbn tbt tbu tkb tkk tkt tky tnb tnk tnn tnt ttb ttk ttn ttt ttu tty tub tuk tun tut tuu tuy tyn tyt ubb ubk ubn ubt ubu uby ukb ukk ukn uku un- unb unk unn unt unu uny utb utk utn utt utu uty uun uut uuu uyu yby ykk ykn ynk ynn ynu yny ytk ytn ytt ytu yuk yun yut yuu yuy yyb yyt yyu yyy