-th a-a a-c a-t aaa aac aad aaf aah aas aat ac- aca acc acd acf ach acs act ad- ada adc add adf adh ads adt af- afa afc afd aff afh afs aft aha ahc ahd ahf ahh ahs aht as- asa asc asd asf ash ass ast at- ata atc atd atf ath ats att c-- caa cac cad caf cah cas cat cca ccc ccd ccf cch ccs cct cda cdc cdd cdf cdh cds cdt cfa cfc cfd cff cfh cfs cft ch- cha chc chd chf chh chs cht csa csc csd csf csh css cst cta ctc ctd ctf cth cts ctt daa dac dad daf dah das dat dca dcc dcd dcf dcs dct dda ddc ddd ddf ddh dds ddt dfa dfc dfd dff dfh dfs dft dh- dha dhc dhd dhf dhh dhs dht dsa dsc dsd dsf dsh dss dst dta dtc dtd dtf dth dts dtt faa fac fad faf fah fas fat fca fcc fcd fcf fcs fct fda fdc fdd fdf fdh fds fdt ffa ffc ffd fff ffh ffs fft fha fhc fhf fhh fhs fsa fsc fsd fsf fsh fss fst fta ftc ftd ftf fth fts ftt haa hac had haf hah has hat hca hcc hcd hcf hch hcs hct hda hdc hdd hdf hdh hds hdt hfa hfc hfd hff hfh hfs hft hha hhc hhd hhf hhh hhs hht hsa hsc hsd hsf hsh hss hst hta htc htd htf hth hts htt saa sac sad saf sah sas sat sca scc scd scf sch scs sct sda sdc sdd sdf sdh sds sdt sfa sfc sfd sff sfh sfs sft sh- sha shc shd shf shh shs sht ss- ssa ssc ssd ssf ssh sss sst sta stc std stf sth sts stt taa tac tad taf tah tas tat tca tcc tcd tcf tch tcs tct tda tdc tdd tdf tdh tds tdt tfa tfc tfd tff tfh tfs tft th- tha thc thd thf thh ths tht tsa tsc tsd tsf tsh tss tst tta ttc ttd ttf tth tts ttt