a-a a-c a-z aaa aac aag aak aas aay aaz ac- aca acc acg ack acs acy acz ag- aga agc agg agk ags agy agz aka akc akg akk aks as- asa asc asg ask ass asy asz ay- aya ayc ayk ays ayz az- aza azg azs azy azz c-- caa cac cag cak cas cay caz cca ccc ccg cck ccs ccz cga cgc cgg cgs cgy cka ckc cks cky csa csc csg csk css csy csz cya cyc cyg cyk cys cz- czc czk gaa gac gag gak gas gay gaz gca gcc gcg gck gcs gga ggc ggg ggs ggz gka gks gsa gsc gsg gsk gss gy- gya gys gza k-z ka- kaa kac kag kak kas kay kaz kca kcc kcg kck kcs kga kgc kgs kgy kkc kkk kks kky ksa ksc ksg ksk kss kya kyc kys kyz kzy saa sac sag sak sas say saz sca scc scg sck scs sga sgc sgg sgk sgs sk- ska skc skg skk sks sky ss- ssa ssc ssg ssk sss ssz sy- sya syc syg syk sys sza yaa yac yag yak yas yay yaz yca ycc ycs ycy yga ygc yka ykk ysa ysc ysg ysk yss ysy ysz yyc yyg yys yyy yyz yzy z-g zaa zac zag zak zas zay zaz zcs zgg zgs zka zks zsa zsg zsz zzs zzy zzz