bbb bbi bbk bbn bbo bbs bby bi- bib bii bik bin bio bis biy bkb bkk bkn bko bks bnb bni bnk bnn bno bns bob boi bok bon boo bos boy bsb bsi bsk bsn bso bss bsy by- byi byk byn byo bys ibb ibi ibk ibn ibo ibs iby iib iii iin iio iis ikb iki ikk iko iks in- inb ini ink inn ino ins iny io- iob ioi ion ioo ios is- isb isi isk isn iso iss isy iyo iys iyy kbb kbi kbk kbn kbo kbs kib kii kik kin kio kis kkb kki kkk kkn kks kky kn- kni knk knn kno kob koi kok kon koo kos koy ksb ksi ksk ksn kso kss kyn kyo kys n-i nbb nbi nbk nbn nbo nbs nib nii nik nin nio nis nki nkk nkn nko nks nky nnb nni nnk nnn nno nns no- nob noi nok non noo nos noy nsb nsi nsk nsn nso nss nsy nyk nyn nyo nys nyy o-i ob- obb obi obk obn obo obs oby oib oii oik oin oio ois okb oki okk oko oks on- onb oni onk onn ono ons ony oo- oob ooi ook oon ooo oos os- osb osi osk osn oso oss oyi oyo oys sbb sbi sbk sbn sbo sbs sby sib sii sik sin sio sis sk- skb ski skk sko sks sky snb sni snk snn sno sns sny sob soi sok son soo sos soy ss- ssb ssi ssk ssn sso sss sy- syb syi syk syn sys ybi ybs yby yii yin yio yis yki ykk ykn ynk ynn yns yny yob yoi yok yon yoo yos yoy ysb ysi ysk yso yss ysy yyb yys yyy