a-a a-c aaa aac aag aan aao aap ac- aca acc acg acn aco acp ag- aga agc agg agn ago agp an- ana anc ang ann ano anp aoa aoc aog aon aoo aop ap- apa apc apg apn apo app c-- caa cac cag can cao cap cca ccc ccg ccn cco ccp cga cgc cgg cgn cgo cgp cn- cna cnc cng cnn cno cnp co- coa coc cog con coo cop cpa cpc cpg cpn cpo cpp g-p gaa gac gag gan gao gap gca gcc gcg gcn gco gcp gga ggc ggg ggn ggo ggp gna gnc gnn gno gnp goa goc gog gon goo gop gpa gpc gpg gpn gpo gpp naa nac nag nan nao nap nca ncc ncg ncn nco ncp nga ngc ngg ngn ngo ngp nna nnc nng nnn nno nnp no- noa noc nog non noo nop npa npc npg npn npo npp oaa oac oag oan oao oap oc- oca occ ocg ocn oco ocp oga ogc ogg ogn ogo ogp on- ona onc ong onn ono onp oo- ooa ooc oog oon ooo oop op- opa opc opg opn opo opp p-p paa pac pag pan pao pap pca pcc pcg pcn pco pcp pga pgc pgg pgn pgo pgp pn- pna pnc png pnn pno pnp poa poc pog pon poo pop ppa ppc ppg ppn ppo ppp