a-a a-c aaa aac aag aan aar ac- aca acc acg acn acr ag- aga agc agg agn agr an- ana anc ang ann anr ar- ara arc arg arn arr c-- caa cac cag can car cca ccc ccg ccn ccr cga cgc cgg cgn cgr cn- cna cnc cng cnn cnr cra crc crg crn crr gaa gac gag gan gar gca gcc gcg gcn gcr gga ggc ggg ggn ggr gna gnc gnn gnr gra grc grg grn grr naa nac nag nan nar nca ncc ncg ncn ncr nga ngc ngg ngn nna nnc nng nnn nra nrc nrg nrn nrr ra- raa rac rag ran rar rca rcc rcg rcn rcr rga rgc rgg rgn rgr rna rnc rng rnn rnr rra rrc rrg rrn rrr