-er a-a a-b a-t aaa aab aad aae aag aan aar aas aat ab- aba abb abd abe abg abn abr abs abt ad- ada adb add ade adg adn adr ads adt aea aeb aed aee aeg aen aer aes aet ag- aga agb agd age agg agn agr ags agt an- ana anb and ane ang ann anr ans ant ar- ara arb ard are arg arn arr ars art as- asa asb asd ase asg asn asr ass ast at- ata atb atd ate atg atn atr ats att baa bab bad bae bag ban bar bas bat bba bbb bbd bbe bbg bbn bbr bbs bbt bda bdb bdd bde bdg bdr bds bdt be- bea beb bed bee beg ben ber bes bet bga bgb bgd bge bgg bgn bgr bgs bgt bna bnb bnd bne bng bnn bnr bns bnt bra brb brd bre brg brn brr brs brt bsa bsb bsd bse bsg bsn bsr bss bst bta btb btd bte btg btn btr bts btt daa dab dad dae dag dan dar das dat dba dbb dbd dbe dbg dbn dbr dbs dbt dda ddb ddd dde ddg ddn ddr dds ddt de- dea deb ded dee deg den der des det dga dgd dge dgg dgn dgr dgs dgt dna dnb dnd dne dng dnn dnr dns dnt dra drb drd dre drg drn drr drs drt dsa dsb dsd dse dsg dsn dsr dss dst dta dtb dtd dte dtg dtn dtr dts dtt eaa eab ead eae eag ean ear eas eat eba ebb ebd ebe ebg ebn ebr ebs ebt ed- eda edb edd ede edg edn edr eds edt eea eeb eed eee eeg een eer ees eet ega egb egd ege egg egn egr egs egt en- ena enb end ene eng enn enr ens ent era erb erd ere erg ern err ers ert es- esa esb esd ese esg esn esr ess est eta etb etd ete etg etn etr ets ett g-d gaa gab gad gae gag gan gar gas gat gba gbd gbe gbg gbn gbr gbs gbt gda gdb gdd gde gdn gdr gds gdt ge- gea geb ged gee geg gen ger ges get gga ggb ggd ggg ggn ggr ggs ggt gna gnb gnd gne gnn gnr gns gnt gra grb grd gre grg grn grr grs grt gsa gsb gsd gse gsg gsn gsr gss gst gta gtb gtd gte gtg gtn gtr gts gtt naa nab nad nae nag nan nar nas nat nba nbb nbd nbe nbg nbn nbr nbs nbt nda ndb ndd nde ndg ndn ndr nds ndt ne- nea neb ned nee neg nen ner nes net nga ngb ngd nge ngg ngn ngs ngt nna nnb nne nng nnn nns nnt nra nrb nrd nre nrg nrn nrr nrs nrt nsa nsb nsd nse nsg nsn nsr nss nst nta ntb ntd nte ntg ntn ntr nts ntt ra- raa rab rad rae rag ran rar ras rat rba rbb rbd rbe rbg rbn rbr rbs rbt rda rdb rdd rde rdg rdn rdr rds rdt re- rea reb red ree reg ren rer res ret rga rgb rgd rge rgg rgn rgr rgs rgt rna rnb rnd rng rnn rnr rns rnt rra rrb rrd rrg rrn rrr rrs rrt rsa rsb rsd rse rsg rsn rsr rss rst rta rtb rtd rte rtg rtn rtr rts rtt saa sab sad sae sag san sar sas sat sba sbb sbd sbe sbg sbn sbr sbs sbt sda sdb sdd sde sdg sdn sdr sds sdt se- sea seb sed see seg sen ser ses set sga sgb sgd sge sgg sgn sgr sgs sgt sna snb snd sne sng snn snr sns snt sr- sra srb srd sre srg srn srr srs srt ss- ssa ssb ssd sse ssg ssn ssr sss sst sta stb std ste stg stn str sts stt taa tab tad tae tag tan tar tas tat tba tbb tbd tbe tbg tbn tbr tbs tbt tda tdb tdd tde tdg tdn tdr tds tdt te- tea teb ted tee teg ten ter tes tet tga tgb tge tgg tgn tgr tgs tgt tna tnb tnd tne tng tnn tnr tns tnt tra trb trd tre trg trn trr trs trt tsa tsb tsd tse tsg tsn tsr tss tst tta ttb ttd tte ttg ttn ttr tts ttt