bbb bbi bbk bbn bbo bby bi- bib bii bik bin bio biy bkb bkk bkn bko bnb bni bnk bnn bno bob boi bok bon boo boy by- byi byk byn byo ibb ibi ibk ibn ibo iby iib iii iin iio ikb iki ikk iko in- inb ini ink inn ino iny io- iob ioi ion ioo iyo iyy kbb kbi kbk kbn kbo kib kii kik kin kio kkb kki kkk kkn kky kn- kni knk knn kno kob koi kok kon koo koy kyn kyo n-i nbb nbi nbk nbn nbo nib nii nik nin nio nki nkk nkn nko nky nnb nni nnk nnn nno no- nob noi nok non noo noy nyk nyn nyo nyy o-i ob- obb obi obk obn obo oby oib oii oik oin oio okb oki okk oko on- onb oni onk onn ono ony oo- oob ooi ook oon ooo oyi oyo ybi yby yii yin yio yki ykk ykn ynk ynn yny yob yoi yok yon yoo yoy yyb yyy