a-a a-c a-z aaa aac aag aan aao aas aaz ac- aca acc acg acn aco acs acz ag- aga agc agg agn ago ags agz an- ana anc ang ann ano ans anz aoa aoc aog aon aoo aos as- asa asc asg asn aso ass asz az- aza azg azn azo azs azz c-- caa cac cag can cao cas caz cca ccc ccg ccn cco ccs ccz cga cgc cgg cgn cgo cgs cn- cna cnc cng cnn cno cns co- coa coc cog con coo cos coz csa csc csg csn cso css csz cz- czc czo gaa gac gag gan gao gas gaz gca gcc gcg gcn gco gcs gga ggc ggg ggn ggo ggs ggz gna gnc gnn gno gns goa goc gog gon goo gos goz gsa gsc gsg gsn gso gss gza gzo naa nac nag nan nao nas naz nca ncc ncg ncn nco ncs nga ngc ngg ngn ngo ngs nna nnc nng nnn nno nns nnz no- noa noc nog non noo nos noz nsa nsc nsg nsn nso nss nsz nzg nzo nzs nzz oaa oac oag oan oao oas oc- oca occ ocg ocn oco ocs ocz oga ogc ogg ogn ogo ogs on- ona onc ong onn ono ons oo- ooa ooc oog oon ooo oos os- osa osc osg osn oso oss oza ozo ozs ozz saa sac sag san sao sas saz sca scc scg scn sco scs sga sgc sgg sgn sgo sgs sna snc sng snn sno sns soa soc sog son soo sos soz ss- ssa ssc ssg ssn sso sss ssz sza z-g zaa zac zag zan zao zas zaz zco zcs zgg zgs znc znn zno zns zo- zoa zoc zog zon zoo zos zsa zsg zsz zzs zzz