-er bbb bbd bbe bbn bbo bbr bbs bbt bdb bdd bde bdo bdr bds bdt be- beb bed bee ben beo ber bes bet bnb bnd bne bnn bno bnr bns bnt bob bod boe bon boo bor bos bot brb brd bre brn bro brr brs brt bsb bsd bse bsn bso bsr bss bst btb btd bte btn bto btr bts btt dbb dbd dbe dbn dbo dbr dbs dbt ddb ddd dde ddn ddo ddr dds ddt de- deb ded dee den deo der des det dnb dnd dne dnn dno dnr dns dnt dob dod doe don doo dor dos dot drb drd dre drn dro drr drs drt dsb dsd dse dsn dso dsr dss dst dtb dtd dte dtn dto dtr dts dtt ebb ebd ebe ebn ebo ebr ebs ebt ed- edb edd ede edn edo edr eds edt eeb eed eee een eeo eer ees eet en- enb end ene enn eno enr ens ent eo- eob eod eoe eon eoo eor eos eot erb erd ere ern ero err ers ert es- esb esd ese esn eso esr ess est etb etd ete etn eto etr ets ett nbb nbd nbe nbn nbo nbr nbs nbt ndb ndd nde ndn ndo ndr nds ndt ne- neb ned nee nen neo ner nes net nnb nne nnn nno nns nnt no- nob nod noe non noo nor nos not nrb nrd nre nrn nro nrr nrs nrt nsb nsd nse nsn nso nsr nss nst ntb ntd nte ntn nto ntr nts ntt ob- obb obd obe obn obo obr obs obt odb odd ode odn odo odr ods odt oeb oed oee oen oeo oer oes oet on- onb ond one onn ono onr ons ont oo- oob ood oon ooo oor oos oot or- orb ord ore orn oro orr ors ort os- osb osd ose osn oso osr oss ost ot- otb otd ote otn oto otr ots ott rbb rbd rbe rbn rbo rbr rbs rbt rdb rdd rde rdn rdo rdr rds rdt re- reb red ree ren reo rer res ret rnb rnd rnn rno rnr rns rnt rob rod roe ron roo ror ros rot rrb rrd rrn rrr rrs rrt rsb rsd rse rsn rso rsr rss rst rtb rtd rte rtn rto rtr rts rtt sbb sbd sbe sbn sbo sbr sbs sbt sdb sdd sde sdn sdo sdr sds sdt se- seb sed see sen seo ser ses set snb snd sne snn sno snr sns snt sob sod soe son soo sor sos sot sr- srb srd sre srn sro srr srs srt ss- ssb ssd sse ssn sso ssr sss sst stb std ste stn sto str sts stt tbb tbd tbe tbn tbo tbr tbs tbt tdb tdd tde tdn tdo tdr tds tdt te- teb ted tee ten teo ter tes tet tnb tnd tne tnn tno tnr tns tnt to- tob tod toe ton too tor tos tot trb trd tre trn tro trr trs trt tsb tsd tse tsn tso tsr tss tst ttb ttd tte ttn tto ttr tts ttt