a-a a-c a-t aaa aac aad aak aas aat ac- aca acc acd ack acs act ad- ada adc add adk ads adt aka akc akd akk aks as- asa asc asd ask ass ast at- ata atc atd ats att c-- caa cac cad cak cas cat cca ccc ccd cck ccs cct cda cdc cdd cdk cds cdt cka ckc ckd cks ckt csa csc csd csk css cst cta ctc ctd ctk cts ctt daa dac dad dak das dat dca dcc dcd dck dcs dct dda ddc ddd ddk dds ddt dka dkc dkk dks dkt dsa dsc dsd dsk dss dst dta dtc dtd dtk dts dtt k-t ka- kaa kac kad kak kas kat kca kcc kcd kck kcs kct kda kdc kdk kds kdt kkc kkk kks kkt ksa ksc ksd ksk kss kst kta ktc ktk kts ktt saa sac sad sak sas sat sca scc scd sck scs sct sda sdc sdd sdk sds sdt sk- ska skc skd skk sks skt ss- ssa ssc ssd ssk sss sst sta stc std stk sts stt taa tac tad tak tas tat tca tcc tcd tck tcs tct tda tdc tdd tdk tds tdt tka tkc tkk tks tkt tsa tsc tsd tsk tss tst tta ttc ttd ttk tts ttt