a-a a-c aaa aac aag aan aao aar ac- aca acc acg acn aco acr ag- aga agc agg agn ago agr an- ana anc ang ann ano anr aoa aoc aog aon aoo aor ar- ara arc arg arn aro arr c-- caa cac cag can cao car cca ccc ccg ccn cco ccr cga cgc cgg cgn cgo cgr cn- cna cnc cng cnn cno cnr co- coa coc cog con coo cor cra crc crg crn cro crr gaa gac gag gan gao gar gca gcc gcg gcn gco gcr gga ggc ggg ggn ggo ggr gna gnc gnn gno gnr goa goc gog gon goo gor gra grc grg grn gro grr naa nac nag nan nao nar nca ncc ncg ncn nco ncr nga ngc ngg ngn ngo nna nnc nng nnn nno no- noa noc nog non noo nor nra nrc nrg nrn nro nrr oaa oac oag oan oao oar oc- oca occ ocg ocn oco ocr oga ogc ogg ogn ogo on- ona onc ong onn ono onr oo- ooa ooc oog oon ooo oor or- ora orc org orn oro orr ra- raa rac rag ran rao rar rca rcc rcg rcn rco rcr rga rgc rgg rgn rgo rgr rna rnc rng rnn rno rnr roa roc rog ron roo ror rra rrc rrg rrn rrr