-up b-p b-u bbb bbd bbe bbo bbp bbu bdb bdd bde bdo bdp bdu be- beb bed bee beo bep beu bob bod boe boo bop bou bpb bpd bpe bpo bpp bpu bub bud bue buo bup buu dbb dbd dbe dbo dbp dbu ddb ddd dde ddo ddp ddu de- deb ded dee deo dep deu dob dod doe doo dop dou dpb dpd dpe dpo dpp dpu dub dud due duo dup ebb ebd ebe ebo ebp ebu ed- edb edd ede edo edp edu eeb eed eee eeo eep eo- eob eod eoe eoo eop eou ep- epb epd epe epo epp epu eu- eub eud eue eup ob- obb obd obe obo obp obu odb odd ode odo odp odu oeb oed oee oeo oep oo- oob ood ooo oop op- opb opd ope opo opp ou- oud oue ouo oup p-p pbb pbd pbe pbo pbp pbu pdb pdd pde pdo pdp pdu peb ped pee peo pep peu pob pod poe poo pop pou ppb ppd ppe ppo ppp ppu pub pud pue pup puu ubb ube ubo ubp ubu udb udd ude udo udp udu ueb ued uee uep uob uod uoe uoo uop up- upb upd upe upo upp upu uue uuu