a-a a-c aaa aac aae aag aak aao aap ac- aca acc ace acg ack aco acp aea aec aee aeg aek aeo aep ag- aga agc age agg agk ago agp aka akc ake akg akk ako akp aoa aoc aoe aog aok aoo aop ap- apa apc ape apg apk apo app c-- caa cac cae cag cak cao cap cca ccc cce ccg cck cco ccp ce- cea cec cee ceg cek ceo cep cga cgc cge cgg cgo cgp cka ckc cko co- coa coc coe cog cok coo cop cpa cpc cpe cpg cpk cpo cpp eaa eac eae eag eak eao eap ec- eca ecc ece ecg eck eco eea eec eee eeg eek eeo eep ega egc ege egg ego egp eka ekc eke ekg eko ekp eo- eoa eoc eoe eog eok eoo eop ep- epa epc epe epg epo epp g-p gaa gac gae gag gak gao gap gca gcc gce gcg gck gco gcp ge- gea gec gee geg gek geo gep gga ggc ggg ggo ggp gka gko gkp goa goc goe gog gok goo gop gpa gpc gpe gpg gpk gpo gpp ka- kaa kac kae kag kak kao kap kca kcc kce kcg kck kcp ke- kea kec kee keg kek keo kep kga kgc kgo kgp kkc kke kkk kkp koa koc koe kog kok koo kop kpa kpc kpe kpk kpo kpp oaa oac oae oag oak oao oap oc- oca occ ocg ock oco ocp oea oec oee oeg oeo oep oga ogc oge ogg ogo ogp oka okc oke okg okk oko okp oo- ooa ooc oog ook ooo oop op- opa opc ope opg opk opo opp p-p paa pac pae pag pak pao pap pca pcc pce pcg pck pco pcp pea pec pee peg pek peo pep pga pgc pge pgg pgk pgo pgp pka pkc pke pkg pko pkp poa poc poe pog pok poo pop ppa ppc ppe ppg ppk ppo ppp