a-a a-c aaa aac aag aao aap aar ac- aca acc acg aco acp acr ag- aga agc agg ago agp agr aoa aoc aog aoo aop aor ap- apa apc apg apo app apr ar- ara arc arg aro arp arr c-- caa cac cag cao cap car cca ccc ccg cco ccp ccr cga cgc cgg cgo cgp cgr co- coa coc cog coo cop cor cpa cpc cpg cpo cpp cpr cra crc crg cro crp crr g-p gaa gac gag gao gap gar gca gcc gcg gco gcp gcr gga ggc ggg ggo ggp ggr goa goc gog goo gop gor gpa gpc gpg gpo gpp gpr gra grc grg gro grp grr oaa oac oag oao oap oar oc- oca occ ocg oco ocp ocr oga ogc ogg ogo ogp oo- ooa ooc oog ooo oop oor op- opa opc opg opo opp opr or- ora orc org oro orp orr p-p paa pac pag pao pap par pca pcc pcg pco pcp pcr pga pgc pgg pgo pgp pgr poa poc pog poo pop por ppa ppc ppg ppo ppp ppr pra prc prg pro prp prr ra- raa rac rag rao rap rar rca rcc rcg rco rcp rcr rga rgc rgg rgo rgp rgr roa roc rog roo rop ror rpa rpc rpg rpo rpp rpr rra rrc rrg rrp rrr