b-u bbb bbi bbk bbn bbs bbu bby bi- bib bii bik bin bis biu biy bkb bkk bkn bks bnb bni bnk bnn bns bnu bsb bsi bsk bsn bss bsu bsy bub bui buk bun bus buu buy by- byi byk byn bys byu ibb ibi ibk ibn ibs ibu iby iib iii iin iis iiu ikb iki ikk iks iku in- inb ini ink inn ins inu iny is- isb isi isk isn iss isu isy iu- iub iui ius iys iyy kbb kbi kbk kbn kbs kbu kib kii kik kin kis kiu kkb kki kkk kkn kks kku kky kn- kni knk knn knu ksb ksi ksk ksn kss ksu kub kui kuk kun kus kuu kuy kyn kys kyu n-i nbb nbi nbk nbn nbs nbu nib nii nik nin nis niu nki nkk nkn nks nku nky nnb nni nnk nnn nns nnu nsb nsi nsk nsn nss nsu nsy nub nui nuk nun nus nuu nuy nyk nyn nys nyu nyy sbb sbi sbk sbn sbs sbu sby sib sii sik sin sis siu sk- skb ski skk sks sku sky snb sni snk snn sns snu sny ss- ssb ssi ssk ssn sss ssu sub sui suk sun sus suu suy sy- syb syi syk syn sys syu ubb ubi ubk ubn ubs ubu uby uib uii uin uis uiu ukb uki ukk ukn uku un- unb uni unk unn uns unu uny usb usi usk usn uss usu uun uus uuu uyi uys uyu ybi ybs yby yii yin yis yki ykk ykn ynk ynn yns ynu yny ysb ysi ysk yss ysu ysy yui yuk yun yus yuu yuy yyb yys yyu yyy