-th a-a a-b a-c a-t aaa aab aac aad aae aah aat ab- aba abb abc abd abe abh abt ac- aca acb acc acd ace ach act ad- ada adb adc add ade adh adt aea aeb aec aed aee aeh aet aha ahb ahc ahd ahe ahh aht at- ata atb atc atd ate ath att baa bab bac bad bae bah bat bba bbb bbc bbd bbe bbh bbt bca bcb bcc bcd bce bch bct bda bdb bdc bdd bde bdh bdt be- bea beb bec bed bee beh bet bha bhb bhc bhd bhe bhh bht bta btb btc btd bte bth btt c-- caa cab cac cad cae cah cat cba cbb cbc cbd cbe cbh cbt cca ccb ccc ccd cce cch cct cda cdb cdc cdd cde cdh cdt ce- cea ceb cec ced cee ceh cet ch- cha chb chc chd che chh cht cta ctb ctc ctd cte cth ctt daa dab dac dad dae dah dat dba dbb dbc dbd dbe dbh dbt dca dcb dcc dcd dce dct dda ddb ddc ddd dde ddh ddt de- dea deb dec ded dee deh det dh- dha dhb dhc dhd dhe dhh dht dta dtb dtc dtd dte dth dtt eaa eab eac ead eae eah eat eba ebb ebc ebd ebe ebh ebt ec- eca ecb ecc ecd ece ech ect ed- eda edb edc edd ede edh edt eea eeb eec eed eee eet eha ehb ehc ehd ehe ehh eht eta etb etc etd ete eth ett haa hab hac had hae hah hat hba hbb hbc hbd hbe hbh hbt hca hcb hcc hcd hce hch hct hda hdb hdc hdd hde hdh hdt he- hea heb hec hed hee heh het hha hhb hhc hhd hhe hhh hht hta htb htc htd hte hth htt taa tab tac tad tae tah tat tba tbb tbc tbd tbe tbh tbt tca tcb tcc tcd tce tch tct tda tdb tdc tdd tde tdh tdt te- tea teb tec ted tee teh tet th- tha thb thc thd the thh tht tta ttb ttc ttd tte tth ttt