a-a a-c aaa aac aag aak aap aar ac- aca acc acg ack acp acr ag- aga agc agg agk agp agr aka akc akg akk akp akr ap- apa apc apg apk app apr ar- ara arc arg ark arp arr c-- caa cac cag cak cap car cca ccc ccg cck ccp ccr cga cgc cgg cgp cgr cka ckc cpa cpc cpg cpk cpp cpr cra crc crg crk crp crr g-p gaa gac gag gak gap gar gca gcc gcg gck gcp gcr gga ggc ggg ggp ggr gka gkp gpa gpc gpg gpk gpp gpr gra grc grg grk grp grr ka- kaa kac kag kak kap kar kca kcc kcg kck kcp kcr kga kgc kgp kkc kkk kkp kkr kpa kpc kpk kpp kpr kra krc krg krk krp krr p-p paa pac pag pak pap par pca pcc pcg pck pcp pcr pga pgc pgg pgk pgp pgr pka pkc pkg pkp pkr ppa ppc ppg ppk ppp ppr pra prc prg prk prp prr ra- raa rac rag rak rap rar rca rcc rcg rcp rcr rga rgc rgg rgk rgp rgr rkc rkg rkk rkp rpa rpc rpg rpk rpp rpr rra rrc rrg rrk rrp rrr