-th a-a a-b a-t aaa aab aad aae aah aas aat ab- aba abb abd abe abh abs abt ad- ada adb add ade adh ads adt aea aeb aed aee aeh aes aet aha ahb ahd ahe ahh ahs aht as- asa asb asd ase ash ass ast at- ata atb atd ate ath ats att baa bab bad bae bah bas bat bba bbb bbd bbe bbh bbs bbt bda bdb bdd bde bdh bds bdt be- bea beb bed bee beh bes bet bha bhb bhd bhe bhh bhs bht bsa bsb bsd bse bsh bss bst bta btb btd bte bth bts btt daa dab dad dae dah das dat dba dbb dbd dbe dbh dbs dbt dda ddb ddd dde ddh dds ddt de- dea deb ded dee deh des det dh- dha dhb dhd dhe dhh dhs dht dsa dsb dsd dse dsh dss dst dta dtb dtd dte dth dts dtt eaa eab ead eae eah eas eat eba ebb ebd ebe ebh ebs ebt ed- eda edb edd ede edh eds edt eea eeb eed eee ees eet eha ehb ehd ehe ehh ehs eht es- esa esb esd ese esh ess est eta etb etd ete eth ets ett haa hab had hae hah has hat hba hbb hbd hbe hbh hbs hbt hda hdb hdd hde hdh hds hdt he- hea heb hed hee heh hes het hha hhb hhd hhe hhh hhs hht hsa hsb hsd hse hsh hss hst hta htb htd hte hth hts htt saa sab sad sae sah sas sat sba sbb sbd sbe sbh sbs sbt sda sdb sdd sde sdh sds sdt se- sea seb sed see seh ses set sh- sha shb shd she shh shs sht ss- ssa ssb ssd sse ssh sss sst sta stb std ste sth sts stt taa tab tad tae tah tas tat tba tbb tbd tbe tbh tbs tbt tda tdb tdd tde tdh tds tdt te- tea teb ted tee teh tes tet th- tha thb thd the thh ths tht tsa tsb tsd tse tsh tss tst tta ttb ttd tte tth tts ttt