a-a a-c aaa aac aag aao aas aay ac- aca acc acg aco acs acy ag- aga agc agg ago ags agy aoa aoc aog aoo aos as- asa asc asg aso ass asy ay- aya ayc ayo ays c-- caa cac cag cao cas cay cca ccc ccg cco ccs cga cgc cgg cgo cgs cgy co- coa coc cog coo cos coy csa csc csg cso css csy cya cyc cyg cyo cys gaa gac gag gao gas gay gca gcc gcg gco gcs gga ggc ggg ggo ggs goa goc gog goo gos goy gsa gsc gsg gso gss gy- gya gyo gys oaa oac oag oao oas oc- oca occ ocg oco ocs oga ogc ogg ogo ogs ogy oo- ooa ooc oog ooo oos os- osa osc osg oso oss oya oyo oys saa sac sag sao sas say sca scc scg sco scs sga sgc sgg sgo sgs soa soc sog soo sos soy ss- ssa ssc ssg sso sss sy- sya syc syg sys yaa yac yag yao yas yay yca ycc yco ycs ycy yga ygc ygo yoc yog yoo yos yoy ysa ysc ysg yso yss ysy yyc yyg yys yyy