-er -th a-a a-b a-t aaa aab aad aae aah aar aas aat ab- aba abb abd abe abh abr abs abt ad- ada adb add ade adh adr ads adt aea aeb aed aee aeh aer aes aet aha ahb ahd ahe ahh ahr ahs aht ar- ara arb ard are arh arr ars art as- asa asb asd ase ash asr ass ast at- ata atb atd ate ath atr ats att baa bab bad bae bah bar bas bat bba bbb bbd bbe bbh bbr bbs bbt bda bdb bdd bde bdh bdr bds bdt be- bea beb bed bee beh ber bes bet bha bhb bhd bhe bhh bhr bhs bht bra brb brd bre brh brr brs brt bsa bsb bsd bse bsh bsr bss bst bta btb btd bte bth btr bts btt daa dab dad dae dah dar das dat dba dbb dbd dbe dbh dbr dbs dbt dda ddb ddd dde ddh ddr dds ddt de- dea deb ded dee deh der des det dh- dha dhb dhd dhe dhh dhr dhs dht dra drb drd dre drr drs drt dsa dsb dsd dse dsh dsr dss dst dta dtb dtd dte dth dtr dts dtt eaa eab ead eae eah ear eas eat eba ebb ebd ebe ebh ebr ebs ebt ed- eda edb edd ede edh edr eds edt eea eeb eed eee eer ees eet eha ehb ehd ehe ehh ehr ehs eht era erb erd ere erh err ers ert es- esa esb esd ese esh esr ess est eta etb etd ete eth etr ets ett haa hab had hae hah har has hat hba hbb hbd hbe hbh hbr hbs hbt hda hdb hdd hde hdh hdr hds hdt he- hea heb hed hee heh her hes het hha hhb hhd hhe hhh hhr hhs hht hr- hra hrb hrd hre hrh hrr hrs hrt hsa hsb hsd hse hsh hsr hss hst hta htb htd hte hth htr hts htt ra- raa rab rad rae rah rar ras rat rba rbb rbd rbe rbh rbr rbs rbt rda rdb rdd rde rdh rdr rds rdt re- rea reb red ree reh rer res ret rh- rha rhb rhd rhe rhh rhr rhs rht rra rrb rrd rrh rrr rrs rrt rsa rsb rsd rse rsh rsr rss rst rta rtb rtd rte rtr rts rtt saa sab sad sae sah sar sas sat sba sbb sbd sbe sbh sbr sbs sbt sda sdb sdd sde sdh sdr sds sdt se- sea seb sed see seh ser ses set sh- sha shb shd she shh shr shs sht sr- sra srb srd sre srh srr srs srt ss- ssa ssb ssd sse ssh ssr sss sst sta stb std ste sth str sts stt taa tab tad tae tah tar tas tat tba tbb tbd tbe tbh tbr tbs tbt tda tdb tdd tde tdh tdr tds tdt te- tea teb ted tee teh ter tes tet th- tha thb thd the thh thr ths tht tra trb trd tre trh trr trs trt tsa tsb tsd tse tsh tsr tss tst tta ttb ttd tte tth ttr tts ttt