b-p bbb bbf bbi bbn bbo bbp bfb bff bfi bfn bfo bfp bi- bib bif bii bin bio bip bnb bnf bni bnn bno bnp bob bof boi bon boo bop bpb bpf bpi bpn bpo bpp fbb fbf fbi fbn fbo fbp fff ffi ffn ffo ffp fib fif fii fin fip fnb fnf fni fnn fnp fob fof foi fon foo fop fpb fpi fpn fpo fpp i-f ibb ibf ibi ibn ibo ibp ifb iff ifi ifn ifo ifp iib iif iii iin iio iip in- inb inf ini inn ino inp io- iob iof ioi ion ioo iop ipb ipf ipi ipn ipo ipp n-i nbb nbf nbi nbn nbo nbp nfb nff nfi nfn nfo nfp nib nif nii nin nio nip nnb nnf nni nnn nno nnp no- nob nof noi non noo nop npb npf npi npn npo npp o-i ob- obb obf obi obn obo obp of- ofb off ofi ofn ofo ofp oib oif oii oin oio oip on- onb onf oni onn ono onp oo- oob oof ooi oon ooo oop op- opb opf opi opn opo opp p-p pbb pbf pbi pbn pbo pbp pfb pff pfi pfn pfo pfp pib pif pii pin pio pip pn- pnb pnf pni pnn pno pnp pob pof poi pon poo pop ppb ppf ppi ppn ppo ppp