b-p bbb bbd bbe bbo bbp bdb bdd bde bdo bdp be- beb bed bee beo bep bob bod boe boo bop bpb bpd bpe bpo bpp dbb dbd dbe dbo dbp ddb ddd dde ddo ddp de- deb ded dee deo dep dob dod doe doo dop dpb dpd dpe dpo dpp ebb ebd ebe ebo ebp ed- edb edd ede edo edp eeb eed eee eeo eep eo- eob eod eoe eoo eop ep- epb epd epe epo epp ob- obb obd obe obo obp odb odd ode odo odp oeb oed oee oeo oep oo- oob ood ooo oop op- opb opd ope opo opp p-p pbb pbd pbe pbo pbp pdb pdd pde pdo pdp peb ped pee peo pep pob pod poe poo pop ppb ppd ppe ppo ppp