a-a a-c aaa aac aae aag aan aao aap aas ac- aca acc ace acg acn aco acp acs aea aec aee aeg aen aeo aep aes ag- aga agc age agg agn ago agp ags an- ana anc ane ang ann ano anp ans aoa aoc aoe aog aon aoo aop aos ap- apa apc ape apg apn apo app aps as- asa asc ase asg asn aso asp ass c-- caa cac cae cag can cao cap cas cca ccc cce ccg ccn cco ccp ccs ce- cea cec cee ceg cen ceo cep ces cga cgc cge cgg cgn cgo cgp cgs cn- cna cnc cne cng cnn cno cnp cns co- coa coc coe cog con coo cop cos cpa cpc cpe cpg cpn cpo cpp cps csa csc cse csg csn cso csp css eaa eac eae eag ean eao eap eas ec- eca ecc ece ecg ecn eco ecs eea eec eee eeg een eeo eep ees ega egc ege egg egn ego egp egs en- ena enc ene eng enn eno enp ens eo- eoa eoc eoe eog eon eoo eop eos ep- epa epc epe epg epn epo epp eps es- esa esc ese esg esn eso esp ess g-p gaa gac gae gag gan gao gap gas gca gcc gce gcg gcn gco gcp gcs ge- gea gec gee geg gen geo gep ges gga ggc ggg ggn ggo ggp ggs gna gnc gne gnn gno gnp gns goa goc goe gog gon goo gop gos gpa gpc gpe gpg gpn gpo gpp gps gsa gsc gse gsg gsn gso gsp gss naa nac nae nag nan nao nap nas nca ncc nce ncg ncn nco ncp ncs ne- nea nec nee neg nen neo nep nes nga ngc nge ngg ngn ngo ngp ngs nna nnc nne nng nnn nno nnp nns no- noa noc noe nog non noo nop nos npa npc npe npg npn npo npp nps nsa nsc nse nsg nsn nso nsp nss oaa oac oae oag oan oao oap oas oc- oca occ ocg ocn oco ocp ocs oea oec oee oeg oen oeo oep oes oga ogc oge ogg ogn ogo ogp ogs on- ona onc one ong onn ono onp ons oo- ooa ooc oog oon ooo oop oos op- opa opc ope opg opn opo opp ops os- osa osc ose osg osn oso osp oss p-p paa pac pae pag pan pao pap pas pca pcc pce pcg pcn pco pcp pcs pea pec pee peg pen peo pep pes pga pgc pge pgg pgn pgo pgp pgs pn- pna pnc pne png pnn pno pnp pns poa poc poe pog pon poo pop pos ppa ppc ppe ppg ppn ppo ppp pps ps- psa psc pse psg psn pso psp pss saa sac sae sag san sao sap sas sca scc sce scg scn sco scp scs se- sea sec see seg sen seo sep ses sga sgc sge sgg sgn sgo sgp sgs sna snc sne sng snn sno snp sns soa soc soe sog son soo sop sos spa spc spe spg spn spo spp sps ss- ssa ssc sse ssg ssn sso ssp sss