-er a-a a-b a-q aaa aab aad aae aan aaq aar aas ab- aba abb abd abe abn abq abr abs ad- ada adb add ade adn adq adr ads aea aeb aed aee aen aeq aer aes an- ana anb and ane ann anq anr ans aqa aqn aqr aqs ar- ara arb ard are arn arq arr ars as- asa asb asd ase asn asq asr ass baa bab bad bae ban baq bar bas bba bbb bbd bbe bbn bbq bbr bbs bda bdb bdd bde bdq bdr bds be- bea beb bed bee ben beq ber bes bna bnb bnd bne bnn bnr bns bqd bqe bra brb brd bre brn brq brr brs bsa bsb bsd bse bsn bsr bss daa dab dad dae dan daq dar das dba dbb dbd dbe dbn dbq dbr dbs dda ddb ddd dde ddn ddq ddr dds de- dea deb ded dee den deq der des dna dnb dnd dne dnn dnq dnr dns dqa dqe dqn dqs dra drb drd dre drn drq drr drs dsa dsb dsd dse dsn dsq dsr dss eaa eab ead eae ean ear eas eba ebb ebd ebe ebn ebq ebr ebs ed- eda edb edd ede edn edr eds eea eeb eed eee een eer ees en- ena enb end ene enn enr ens eqa eqe eqn eqq eqs era erb erd ere ern erq err ers es- esa esb esd ese esn esq esr ess naa nab nad nae nan nar nas nba nbb nbd nbe nbn nbr nbs nda ndb ndd nde ndn ndr nds ne- nea neb ned nee nen ner nes nna nnb nne nnn nns nqs nra nrb nrd nre nrn nrr nrs nsa nsb nsd nse nsn nsr nss qaa qad qan qar qas qba qbd qbe qbq qbs qda qdb qdr qds qed qee qen qnb qnd qne qns qqq qra qrb qre qrs qsa qsd qsr ra- raa rab rad rae ran raq rar ras rba rbb rbd rbe rbn rbr rbs rda rdb rdd rde rdn rdr rds re- rea reb red ree ren req rer res rna rnb rnd rnn rnr rns rqn rqs rra rrb rrd rrn rrq rrr rrs rsa rsb rsd rse rsn rsq rsr rss saa sab sad sae san saq sar sas sba sbb sbd sbe sbn sbq sbr sbs sda sdb sdd sde sdn sdq sdr sds se- sea seb sed see sen seq ser ses sna snb snd sne snn snr sns sqa sqd sqn sqq sqr sqs sr- sra srb srd sre srn srq srr srs ss- ssa ssb ssd sse ssn ssq ssr sss