b-u bbb bbi bbk bbn bbo bbu bby bi- bib bii bik bin bio biu biy bkb bkk bkn bko bnb bni bnk bnn bno bnu bob boi bok bon boo bou boy bub bui buk bun buo buu buy by- byi byk byn byo byu ibb ibi ibk ibn ibo ibu iby iib iii iin iio iiu ikb iki ikk iko iku in- inb ini ink inn ino inu iny io- iob ioi ion ioo iou iu- iub iui iyo iyy kbb kbi kbk kbn kbo kbu kib kii kik kin kio kiu kkb kki kkk kkn kku kky kn- kni knk knn kno knu kob koi kok kon koo kou koy kub kui kuk kun kuu kuy kyn kyo kyu n-i nbb nbi nbk nbn nbo nbu nib nii nik nin nio niu nki nkk nkn nko nku nky nnb nni nnk nnn nno nnu no- nob noi nok non noo nou noy nub nui nuk nun nuo nuu nuy nyk nyn nyo nyu nyy o-i ob- obb obi obk obn obo obu oby oib oii oik oin oio oiu okb oki okk oko oku on- onb oni onk onn ono onu ony oo- oob ooi ook oon ooo ou- oui ouk oun ouo oyi oyo ubb ubi ubk ubn ubo ubu uby uib uii uin uio uiu ukb uki ukk ukn uku un- unb uni unk unn uno unu uny uob uok uon uoo uun uuu uyi uyo uyu ybi yby yii yin yio yki ykk ykn ynk ynn ynu yny yob yoi yok yon yoo you yoy yui yuk yun yuo yuu yuy yyb yyu yyy