-th a-a a-b a-t aaa aab aad aae aah aao aas aat ab- aba abb abd abe abh abo abs abt ad- ada adb add ade adh ado ads adt aea aeb aed aee aeh aeo aes aet aha ahb ahd ahe ahh aho ahs aht aoa aob aod aoe aoh aoo aos aot as- asa asb asd ase ash aso ass ast at- ata atb atd ate ath ato ats att baa bab bad bae bah bao bas bat bba bbb bbd bbe bbh bbo bbs bbt bda bdb bdd bde bdh bdo bds bdt be- bea beb bed bee beh beo bes bet bha bhb bhd bhe bhh bho bhs bht boa bob bod boe boh boo bos bot bsa bsb bsd bse bsh bso bss bst bta btb btd bte bth bto bts btt daa dab dad dae dah dao das dat dba dbb dbd dbe dbh dbo dbs dbt dda ddb ddd dde ddh ddo dds ddt de- dea deb ded dee deh deo des det dh- dha dhb dhd dhe dhh dho dhs dht doa dob dod doe doh doo dos dot dsa dsb dsd dse dsh dso dss dst dta dtb dtd dte dth dto dts dtt eaa eab ead eae eah eao eas eat eba ebb ebd ebe ebh ebo ebs ebt ed- eda edb edd ede edh edo eds edt eea eeb eed eee eeo ees eet eha ehb ehd ehe ehh eho ehs eht eo- eoa eob eod eoe eoh eoo eos eot es- esa esb esd ese esh eso ess est eta etb etd ete eth eto ets ett haa hab had hae hah hao has hat hba hbb hbd hbe hbh hbo hbs hbt hda hdb hdd hde hdh hdo hds hdt he- hea heb hed hee heh heo hes het hha hhb hhd hhe hhh hho hhs hht hoa hob hod hoe hoh hoo hos hot hsa hsb hsd hse hsh hss hst hta htb htd hte hth hto hts htt oaa oab oad oae oah oao oas oat ob- oba obb obd obe obh obo obs obt oda odb odd ode odh odo ods odt oea oeb oed oee oeh oeo oes oet oha ohd ohe ohh oho ohs oht oo- ooa oob ood ooh ooo oos oot os- osa osb osd ose osh oso oss ost ot- ota otb otd ote oth oto ots ott saa sab sad sae sah sao sas sat sba sbb sbd sbe sbh sbo sbs sbt sda sdb sdd sde sdh sdo sds sdt se- sea seb sed see seh seo ses set sh- sha shb shd she shh sho shs sht soa sob sod soe soh soo sos sot ss- ssa ssb ssd sse ssh sso sss sst sta stb std ste sth sto sts stt taa tab tad tae tah tao tas tat tba tbb tbd tbe tbh tbo tbs tbt tda tdb tdd tde tdh tdo tds tdt te- tea teb ted tee teh teo tes tet th- tha thb thd the thh tho ths tht to- toa tob tod toe toh too tos tot tsa tsb tsd tse tsh tso tss tst tta ttb ttd tte tth tto tts ttt