-er b-p bbb bbd bbe bbn bbo bbp bbr bbt bdb bdd bde bdo bdp bdr bdt be- beb bed bee ben beo bep ber bet bnb bnd bne bnn bno bnp bnr bnt bob bod boe bon boo bop bor bot bpb bpd bpe bpn bpo bpp bpr bpt brb brd bre brn bro brp brr brt btb btd bte btn bto btp btr btt dbb dbd dbe dbn dbo dbp dbr dbt ddb ddd dde ddn ddo ddp ddr ddt de- deb ded dee den deo dep der det dnb dnd dne dnn dno dnp dnr dnt dob dod doe don doo dop dor dot dpb dpd dpe dpn dpo dpp dpr dpt drb drd dre drn dro drp drr drt dtb dtd dte dtn dto dtp dtr dtt ebb ebd ebe ebn ebo ebp ebr ebt ed- edb edd ede edn edo edp edr edt eeb eed eee een eeo eep eer eet en- enb end ene enn eno enp enr ent eo- eob eod eoe eon eoo eop eor eot ep- epb epd epe epn epo epp epr ept erb erd ere ern ero erp err ert etb etd ete etn eto etp etr ett nbb nbd nbe nbn nbo nbp nbr nbt ndb ndd nde ndn ndo ndp ndr ndt ne- neb ned nee nen neo nep ner net nnb nne nnn nno nnp nnt no- nob nod noe non noo nop nor not npb npd npe npn npo npp npr npt nrb nrd nre nrn nro nrp nrr nrt ntb ntd nte ntn nto ntp ntr ntt ob- obb obd obe obn obo obp obr obt odb odd ode odn odo odp odr odt oeb oed oee oen oeo oep oer oet on- onb ond one onn ono onp onr ont oo- oob ood oon ooo oop oor oot op- opb opd ope opn opo opp opr opt or- orb ord ore orn oro orp orr ort ot- otb otd ote otn oto otp otr ott p-p pbb pbd pbe pbn pbo pbp pbr pbt pdb pdd pde pdn pdo pdp pdr pdt peb ped pee pen peo pep per pet pn- pnb pnd pne pnn pno pnp pnr pnt pob pod poe pon poo pop por pot ppb ppd ppe ppn ppo ppp ppr ppt prb prd pre prn pro prp prr prt pt- ptb ptd pte ptn pto ptp ptr ptt rbb rbd rbe rbn rbo rbp rbr rbt rdb rdd rde rdn rdo rdp rdr rdt re- reb red ree ren reo rep rer ret rnb rnd rnn rno rnp rnr rnt rob rod roe ron roo rop ror rot rpb rpd rpe rpn rpo rpp rpr rpt rrb rrd rrn rrp rrr rrt rtb rtd rte rtn rto rtp rtr rtt tbb tbd tbe tbn tbo tbp tbr tbt tdb tdd tde tdn tdo tdp tdr tdt te- teb ted tee ten teo tep ter tet tnb tnd tne tnn tno tnp tnr tnt to- tob tod toe ton too top tor tot tpb tpd tpe tpn tpo tpp tpr tpt trb trd tre trn tro trp trr trt ttb ttd tte ttn tto ttp ttr ttt