a-a a-c a-t aaa aac aad aae aaf aao aas aat ac- aca acc acd ace acf aco acs act ad- ada adc add ade adf ado ads adt aea aec aed aee aef aeo aes aet af- afa afc afd afe aff afo afs aft aoa aoc aod aoe aof aoo aos aot as- asa asc asd ase asf aso ass ast at- ata atc atd ate atf ato ats att c-- caa cac cad cae caf cao cas cat cca ccc ccd cce ccf cco ccs cct cda cdc cdd cde cdf cdo cds cdt ce- cea cec ced cee cef ceo ces cet cfa cfc cfd cfe cff cfo cfs cft co- coa coc cod coe cof coo cos cot csa csc csd cse csf cso css cst cta ctc ctd cte ctf cto cts ctt daa dac dad dae daf dao das dat dca dcc dcd dce dcf dco dcs dct dda ddc ddd dde ddf ddo dds ddt de- dea dec ded dee def deo des det dfa dfc dfd dfe dff dfo dfs dft doa doc dod doe dof doo dos dot dsa dsc dsd dse dsf dso dss dst dta dtc dtd dte dtf dto dts dtt eaa eac ead eae eaf eao eas eat ec- eca ecc ecd ece ecf eco ecs ect ed- eda edc edd ede edf edo eds edt eea eec eed eee eef eeo ees eet ef- efa efc efd efe eff efo efs eft eo- eoa eoc eod eoe eof eoo eos eot es- esa esc esd ese esf eso ess est eta etc etd ete etf eto ets ett faa fac fad fae faf fao fas fat fca fcc fcd fce fcf fco fcs fct fda fdc fdd fde fdf fdo fds fdt fea fec fed fee fef feo fes fet ffa ffc ffd ffe fff ffo ffs fft foa foc foe fof foo fos fot fsa fsc fsd fse fsf fso fss fst fta ftc ftd fte ftf fto fts ftt oaa oac oad oae oaf oao oas oat oc- oca occ ocd ocf oco ocs oct oda odc odd ode odf odo ods odt oea oec oed oee oef oeo oes oet of- ofa ofc ofd ofe off ofo ofs oft oo- ooa ooc ood oof ooo oos oot os- osa osc osd ose osf oso oss ost ot- ota otc otd ote otf oto ots ott saa sac sad sae saf sao sas sat sca scc scd sce scf sco scs sct sda sdc sdd sde sdf sdo sds sdt se- sea sec sed see sef seo ses set sfa sfc sfd sfe sff sfo sfs sft soa soc sod soe sof soo sos sot ss- ssa ssc ssd sse ssf sso sss sst sta stc std ste stf sto sts stt taa tac tad tae taf tao tas tat tca tcc tcd tce tcf tco tcs tct tda tdc tdd tde tdf tdo tds tdt te- tea tec ted tee tef teo tes tet tfa tfc tfd tfe tff tfo tfs tft to- toa toc tod toe tof too tos tot tsa tsc tsd tse tsf tso tss tst tta ttc ttd tte ttf tto tts ttt