b-p bbb bbd bbe bbi bbo bbp bdb bdd bde bdi bdo bdp be- beb bed bee bei beo bep bi- bib bid bie bii bio bip bob bod boe boi boo bop bpb bpd bpe bpi bpo bpp dbb dbd dbe dbi dbo dbp ddb ddd dde ddi ddo ddp de- deb ded dee dei deo dep di- dib did die dii dio dip dob dod doe doi doo dop dpb dpd dpe dpi dpo dpp ebb ebd ebe ebi ebo ebp ed- edb edd ede edi edo edp eeb eed eee eeo eep eib eid eie eii eio eip eo- eob eod eoe eoi eoo eop ep- epb epd epe epi epo epp i-d ibb ibd ibe ibi ibo ibp idb idd ide idi ido idp ie- ied iee iei iep iib iid iie iii iio iip io- iob iod ioe ioi ioo iop ipb ipd ipe ipi ipo ipp o-i ob- obb obd obe obi obo obp odb odd ode odi odo odp oeb oed oee oei oeo oep oib oid oie oii oio oip oo- oob ood ooi ooo oop op- opb opd ope opi opo opp p-p pbb pbd pbe pbi pbo pbp pdb pdd pde pdi pdo pdp peb ped pee pei peo pep pib pid pie pii pio pip pob pod poe poi poo pop ppb ppd ppe ppi ppo ppp