-er -up b-p b-u bbb bbd bbe bbn bbo bbp bbr bbu bdb bdd bde bdo bdp bdr bdu be- beb bed bee ben beo bep ber beu bnb bnd bne bnn bno bnp bnr bnu bob bod boe bon boo bop bor bou bpb bpd bpe bpn bpo bpp bpr bpu brb brd bre brn bro brp brr bru bub bud bue bun buo bup bur buu dbb dbd dbe dbn dbo dbp dbr dbu ddb ddd dde ddn ddo ddp ddr ddu de- deb ded dee den deo dep der deu dnb dnd dne dnn dno dnp dnr dob dod doe don doo dop dor dou dpb dpd dpe dpn dpo dpp dpr dpu drb drd dre drn dro drp drr dru dub dud due dun duo dup dur ebb ebd ebe ebn ebo ebp ebr ebu ed- edb edd ede edn edo edp edr edu eeb eed eee een eeo eep eer en- enb end ene enn eno enp enr enu eo- eob eod eoe eon eoo eop eor eou ep- epb epd epe epn epo epp epr epu erb erd ere ern ero erp err eru eu- eub eud eue eun eup eur nbb nbd nbe nbn nbo nbp nbr nbu ndb ndd nde ndn ndo ndp ndr ndu ne- neb ned nee nen neo nep ner neu nnb nne nnn nno nnp nnu no- nob nod noe non noo nop nor nou npb npd npe npn npo npp npr npu nrb nrd nre nrn nro nrp nrr nru nub nud nue nun nuo nup nur nuu ob- obb obd obe obn obo obp obr obu odb odd ode odn odo odp odr odu oeb oed oee oen oeo oep oer on- onb ond one onn ono onp onr onu oo- oob ood oon ooo oop oor op- opb opd ope opn opo opp opr or- orb ord ore orn oro orp orr oru ou- oud oue oun ouo oup our p-p pbb pbd pbe pbn pbo pbp pbr pbu pdb pdd pde pdn pdo pdp pdr pdu peb ped pee pen peo pep per peu pn- pnb pnd pne pnn pno pnp pnr pnu pob pod poe pon poo pop por pou ppb ppd ppe ppn ppo ppp ppr ppu prb prd pre prn pro prp prr pru pub pud pue pun pup pur puu rbb rbd rbe rbn rbo rbp rbr rbu rdb rdd rde rdn rdo rdp rdr rdu re- reb red ree ren reo rep rer reu rnb rnd rnn rno rnp rnr rnu rob rod roe ron roo rop ror rou rpb rpd rpe rpn rpo rpp rpr rpu rrb rrd rrn rrp rrr rru rub rud rue run ruo rup rur ruu ubb ube ubn ubo ubp ubr ubu udb udd ude udn udo udp udr udu ueb ued uee uen uep uer un- unb und une unn uno unp unr unu uob uod uoe uon uoo uop uor up- upb upd upe upn upo upp upr upu ur- urb urd ure urn uro urp urr uru uue uun uur uuu