-th a-a a-b a-c a-t aaa aab aac aad aae aah aao aat ab- aba abb abc abd abe abh abo abt ac- aca acb acc acd ace ach aco act ad- ada adb adc add ade adh ado adt aea aeb aec aed aee aeh aeo aet aha ahb ahc ahd ahe ahh aho aht aoa aob aoc aod aoe aoh aoo aot at- ata atb atc atd ate ath ato att baa bab bac bad bae bah bao bat bba bbb bbc bbd bbe bbh bbo bbt bca bcb bcc bcd bce bch bco bct bda bdb bdc bdd bde bdh bdo bdt be- bea beb bec bed bee beh beo bet bha bhb bhc bhd bhe bhh bho bht boa bob boc bod boe boh boo bot bta btb btc btd bte bth bto btt c-- caa cab cac cad cae cah cao cat cba cbb cbc cbd cbe cbh cbo cbt cca ccb ccc ccd cce cch cco cct cda cdb cdc cdd cde cdh cdo cdt ce- cea ceb cec ced cee ceh ceo cet ch- cha chb chc chd che chh cho cht co- coa cob coc cod coe coh coo cot cta ctb ctc ctd cte cth cto ctt daa dab dac dad dae dah dao dat dba dbb dbc dbd dbe dbh dbo dbt dca dcb dcc dcd dce dco dct dda ddb ddc ddd dde ddh ddo ddt de- dea deb dec ded dee deh deo det dh- dha dhb dhc dhd dhe dhh dho dht doa dob doc dod doe doh doo dot dta dtb dtc dtd dte dth dto dtt eaa eab eac ead eae eah eao eat eba ebb ebc ebd ebe ebh ebo ebt ec- eca ecb ecc ecd ece ech eco ect ed- eda edb edc edd ede edh edo edt eea eeb eec eed eee eeo eet eha ehb ehc ehd ehe ehh eho eht eo- eoa eob eoc eod eoe eoh eoo eot eta etb etc etd ete eth eto ett haa hab hac had hae hah hao hat hba hbb hbc hbd hbe hbh hbo hbt hca hcb hcc hcd hce hch hco hct hda hdb hdc hdd hde hdh hdo hdt he- hea heb hec hed hee heh heo het hha hhb hhc hhd hhe hhh hho hht hoa hob hoc hod hoe hoh hoo hot hta htb htc htd hte hth hto htt oaa oab oac oad oae oah oao oat ob- oba obb obc obd obe obh obo obt oc- oca ocb occ ocd och oco oct oda odb odc odd ode odh odo odt oea oeb oec oed oee oeh oeo oet oha ohc ohd ohe ohh oho oht oo- ooa oob ooc ood ooh ooo oot ot- ota otb otc otd ote oth oto ott taa tab tac tad tae tah tao tat tba tbb tbc tbd tbe tbh tbo tbt tca tcb tcc tcd tce tch tco tct tda tdb tdc tdd tde tdh tdo tdt te- tea teb tec ted tee teh teo tet th- tha thb thc thd the thh tho tht to- toa tob toc tod toe toh too tot tta ttb ttc ttd tte tth tto ttt