b-p bbb bbi bbn bbo bbp bby bi- bib bii bin bio bip biy bnb bni bnn bno bnp bob boi bon boo bop boy bpb bpi bpn bpo bpp bpy by- byi byn byo byp ibb ibi ibn ibo ibp iby iib iii iin iio iip in- inb ini inn ino inp iny io- iob ioi ion ioo iop ipb ipi ipn ipo ipp ipy iyo iyy n-i nbb nbi nbn nbo nbp nib nii nin nio nip nnb nni nnn nno nnp no- nob noi non noo nop noy npb npi npn npo npp nyn nyo nyp nyy o-i ob- obb obi obn obo obp oby oib oii oin oio oip on- onb oni onn ono onp ony oo- oob ooi oon ooo oop op- opb opi opn opo opp opy oyi oyo p-p pbb pbi pbn pbo pbp pby pib pii pin pio pip pn- pnb pni pnn pno pnp pny pob poi pon poo pop poy ppb ppi ppn ppo ppp py- pyb pyn pyo ybi ybp yby yii yin yio yip ynn ynp yny yob yoi yon yoo yop yoy ypo yyb yyy