a-a aaa aag aao aap aas ag- aga agg ago agp ags aoa aog aoo aop aos ap- apa apg apo app aps as- asa asg aso asp ass g-p gaa gag gao gap gas gga ggg ggo ggp ggs goa gog goo gop gos gpa gpg gpo gpp gps gsa gsg gso gsp gss oaa oag oao oap oas oga ogg ogo ogp ogs oo- ooa oog ooo oop oos op- opa opg opo opp ops os- osa osg oso osp oss p-p paa pag pao pap pas pga pgg pgo pgp pgs poa pog poo pop pos ppa ppg ppo ppp pps ps- psa psg pso psp pss saa sag sao sap sas sga sgg sgo sgp sgs soa sog soo sop sos spa spg spo spp sps ss- ssa ssg sso ssp sss