-er bbb bbd bbe bbn bbr bbs bbt bdb bdd bde bdr bds bdt be- beb bed bee ben ber bes bet bnb bnd bne bnn bnr bns bnt brb brd bre brn brr brs brt bsb bsd bse bsn bsr bss bst btb btd bte btn btr bts btt dbb dbd dbe dbn dbr dbs dbt ddb ddd dde ddn ddr dds ddt de- deb ded dee den der des det dnb dnd dne dnn dnr dns dnt drb drd dre drn drr drs drt dsb dsd dse dsn dsr dss dst dtb dtd dte dtn dtr dts dtt ebb ebd ebe ebn ebr ebs ebt ed- edb edd ede edn edr eds edt eeb eed eee een eer ees eet en- enb end ene enn enr ens ent erb erd ere ern err ers ert es- esb esd ese esn esr ess est etb etd ete etn etr ets ett nbb nbd nbe nbn nbr nbs nbt ndb ndd nde ndn ndr nds ndt ne- neb ned nee nen ner nes net nnb nne nnn nns nnt nrb nrd nre nrn nrr nrs nrt nsb nsd nse nsn nsr nss nst ntb ntd nte ntn ntr nts ntt rbb rbd rbe rbn rbr rbs rbt rdb rdd rde rdn rdr rds rdt re- reb red ree ren rer res ret rnb rnd rnn rnr rns rnt rrb rrd rrn rrr rrs rrt rsb rsd rse rsn rsr rss rst rtb rtd rte rtn rtr rts rtt sbb sbd sbe sbn sbr sbs sbt sdb sdd sde sdn sdr sds sdt se- seb sed see sen ser ses set snb snd sne snn snr sns snt sr- srb srd sre srn srr srs srt ss- ssb ssd sse ssn ssr sss sst stb std ste stn str sts stt tbb tbd tbe tbn tbr tbs tbt tdb tdd tde tdn tdr tds tdt te- teb ted tee ten ter tes tet tnb tnd tne tnn tnr tns tnt trb trd tre trn trr trs trt tsb tsd tse tsn tsr tss tst ttb ttd tte ttn ttr tts ttt