b-u bbb bbi bbn bbs bbu bby bi- bib bii bin bis biu biy bnb bni bnn bns bnu bsb bsi bsn bss bsu bsy bub bui bun bus buu buy by- byi byn bys byu ibb ibi ibn ibs ibu iby iib iii iin iis iiu in- inb ini inn ins inu iny is- isb isi isn iss isu isy iu- iub iui ius iys iyy n-i nbb nbi nbn nbs nbu nib nii nin nis niu nnb nni nnn nns nnu nsb nsi nsn nss nsu nsy nub nui nun nus nuu nuy nyn nys nyu nyy sbb sbi sbn sbs sbu sby sib sii sin sis siu snb sni snn sns snu sny ss- ssb ssi ssn sss ssu sub sui sun sus suu suy sy- syb syi syn sys syu ubb ubi ubn ubs ubu uby uib uii uin uis uiu un- unb uni unn uns unu uny usb usi usn uss usu uun uus uuu uyi uys uyu ybi ybs yby yii yin yis ynn yns ynu yny ysb ysi yss ysu ysy yui yun yus yuu yuy yyb yys yyu yyy