-th a-a a-c a-t aaa aac aad aah aas aat ac- aca acc acd ach acs act ad- ada adc add adh ads adt aha ahc ahd ahh ahs aht as- asa asc asd ash ass ast at- ata atc atd ath ats att c-- caa cac cad cah cas cat cca ccc ccd cch ccs cct cda cdc cdd cdh cds cdt ch- cha chc chd chh chs cht csa csc csd csh css cst cta ctc ctd cth cts ctt daa dac dad dah das dat dca dcc dcd dcs dct dda ddc ddd ddh dds ddt dh- dha dhc dhd dhh dhs dht dsa dsc dsd dsh dss dst dta dtc dtd dth dts dtt haa hac had hah has hat hca hcc hcd hch hcs hct hda hdc hdd hdh hds hdt hha hhc hhd hhh hhs hht hsa hsc hsd hsh hss hst hta htc htd hth hts htt saa sac sad sah sas sat sca scc scd sch scs sct sda sdc sdd sdh sds sdt sh- sha shc shd shh shs sht ss- ssa ssc ssd ssh sss sst sta stc std sth sts stt taa tac tad tah tas tat tca tcc tcd tch tcs tct tda tdc tdd tdh tds tdt th- tha thc thd thh ths tht tsa tsc tsd tsh tss tst tta ttc ttd tth tts ttt