a-a a-c a-t aaa aac aak aas aat aax ac- aca acc ack acs act acx aka akc akk aks as- asa asc ask ass ast asx at- ata atc ats att atx ax- axa axk axs axt axx c-- caa cac cak cas cat cax cca ccc cck ccs cct ccx cka ckc cks ckt ckx csa csc csk css cst csx cta ctc ctk cts ctt ctx cxc cxk cxs cxt cxx k-t ka- kaa kac kak kas kat kax kca kcc kck kcs kct kcx kkc kkk kks kkt ksa ksc ksk kss kst kta ktc ktk kts ktt saa sac sak sas sat sax sca scc sck scs sct scx sk- ska skc skk sks skt skx ss- ssa ssc ssk sss sst ssx sta stc stk sts stt stx sxc sxs sxt t-x taa tac tak tas tat tax tca tcc tck tcs tct tcx tka tkc tkk tks tkt tsa tsc tsk tss tst tsx tta ttc ttk tts ttt ttx txk txs txt xaa xac xak xas xat xcx xks xsa xsc xss xst xtc xts xtx xxx