a-a a-c a-t aaa aac aad aae aao aas aat ac- aca acc acd ace aco acs act ad- ada adc add ade ado ads adt aea aec aed aee aeo aes aet aoa aoc aod aoe aoo aos aot as- asa asc asd ase aso ass ast at- ata atc atd ate ato ats att c-- caa cac cad cae cao cas cat cca ccc ccd cce cco ccs cct cda cdc cdd cde cdo cds cdt ce- cea cec ced cee ceo ces cet co- coa coc cod coe coo cos cot csa csc csd cse cso css cst cta ctc ctd cte cto cts ctt daa dac dad dae dao das dat dca dcc dcd dce dco dcs dct dda ddc ddd dde ddo dds ddt de- dea dec ded dee deo des det doa doc dod doe doo dos dot dsa dsc dsd dse dso dss dst dta dtc dtd dte dto dts dtt eaa eac ead eae eao eas eat ec- eca ecc ecd ece eco ecs ect ed- eda edc edd ede edo eds edt eea eec eed eee eeo ees eet eo- eoa eoc eod eoe eoo eos eot es- esa esc esd ese eso ess est eta etc etd ete eto ets ett oaa oac oad oae oao oas oat oc- oca occ ocd oco ocs oct oda odc odd ode odo ods odt oea oec oed oee oeo oes oet oo- ooa ooc ood ooo oos oot os- osa osc osd ose oso oss ost ot- ota otc otd ote oto ots ott saa sac sad sae sao sas sat sca scc scd sce sco scs sct sda sdc sdd sde sdo sds sdt se- sea sec sed see seo ses set soa soc sod soe soo sos sot ss- ssa ssc ssd sse sso sss sst sta stc std ste sto sts stt taa tac tad tae tao tas tat tca tcc tcd tce tco tcs tct tda tdc tdd tde tdo tds tdt te- tea tec ted tee teo tes tet to- toa toc tod toe too tos tot tsa tsc tsd tse tso tss tst tta ttc ttd tte tto tts ttt