a-a a-c a-z aaa aac aag aar aaz ac- aca acc acg acr acz ag- aga agc agg agr agz ar- ara arc arg arr arz az- aza azg azz c-- caa cac cag car caz cca ccc ccg ccr ccz cga cgc cgg cgr cra crc crg crr crz cz- czc gaa gac gag gar gaz gca gcc gcg gcr gga ggc ggg ggr ggz gra grc grg grr gza gzr ra- raa rac rag rar raz rca rcc rcg rcr rga rgc rgg rgr rra rrc rrg rrr rza z-g zaa zac zag zar zaz zgg zzr zzz