a-a a-c a-t aaa aac aak aas aat ac- aca acc ack acs act aka akc akk aks as- asa asc ask ass ast at- ata atc ats att c-- caa cac cak cas cat cca ccc cck ccs cct cka ckc cks ckt csa csc csk css cst cta ctc ctk cts ctt k-t ka- kaa kac kak kas kat kca kcc kck kcs kct kkc kkk kks kkt ksa ksc ksk kss kst kta ktc ktk kts ktt saa sac sak sas sat sca scc sck scs sct sk- ska skc skk sks skt ss- ssa ssc ssk sss sst sta stc stk sts stt taa tac tak tas tat tca tcc tck tcs tct tka tkc tkk tks tkt tsa tsc tsk tss tst tta ttc ttk tts ttt