b-p bbb bbd bbi bbo bbp bdb bdd bdi bdo bdp bi- bib bid bii bio bip bob bod boi boo bop bpb bpd bpi bpo bpp dbb dbd dbi dbo dbp ddb ddd ddi ddo ddp di- dib did dii dio dip dob dod doi doo dop dpb dpd dpi dpo dpp i-d ibb ibd ibi ibo ibp idb idd idi ido idp iib iid iii iio iip io- iob iod ioi ioo iop ipb ipd ipi ipo ipp o-i ob- obb obd obi obo obp odb odd odi odo odp oib oid oii oio oip oo- oob ood ooi ooo oop op- opb opd opi opo opp p-p pbb pbd pbi pbo pbp pdb pdd pdi pdo pdp pib pid pii pio pip pob pod poi poo pop ppb ppd ppi ppo ppp