a-a a-c aaa aac aaf aag aao aap aar ac- aca acc acf acg aco acp acr af- afa afc aff afg afo afp afr ag- aga agc agf agg ago agp agr aoa aoc aof aog aoo aop aor ap- apa apc apf apg apo app apr ar- ara arc arf arg aro arp arr c-- caa cac caf cag cao cap car cca ccc ccf ccg cco ccp ccr cfa cfc cff cfg cfo cfp cfr cga cgc cgg cgo cgp cgr co- coa coc cof cog coo cop cor cpa cpc cpf cpg cpo cpp cpr cra crc crf crg cro crp crr faa fac faf fag fao fap far fca fcc fcf fcg fco fcp fcr ffa ffc fff ffg ffo ffp ffr fga fgc fgf fgg fgp fgr foa foc fof fog foo fop for fpa fpc fpg fpo fpp fpr fra frc frf frg fro frp frr g-p gaa gac gaf gag gao gap gar gca gcc gcf gcg gco gcp gcr gfa gfc gff gfo gfp gfr gga ggc ggg ggo ggp ggr goa goc gof gog goo gop gor gpa gpc gpf gpg gpo gpp gpr gra grc grf grg gro grp grr oaa oac oaf oag oao oap oar oc- oca occ ocf ocg oco ocp ocr of- ofa ofc off ofg ofo ofp ofr oga ogc ogf ogg ogo ogp oo- ooa ooc oof oog ooo oop oor op- opa opc opf opg opo opp opr or- ora orc orf org oro orp orr p-p paa pac paf pag pao pap par pca pcc pcf pcg pco pcp pcr pfa pfc pff pfg pfo pfp pfr pga pgc pgf pgg pgo pgp pgr poa poc pof pog poo pop por ppa ppc ppf ppg ppo ppp ppr pra prc prf prg pro prp prr ra- raa rac raf rag rao rap rar rca rcc rcf rcg rco rcp rcr rfa rfc rff rfg rfo rfp rfr rga rgc rgf rgg rgo rgp rgr roa roc rof rog roo rop ror rpa rpc rpf rpg rpo rpp rpr rra rrc rrf rrg rrp rrr