a-a aaa aag aao aap aar ag- aga agg ago agp agr aoa aog aoo aop aor ap- apa apg apo app apr ar- ara arg aro arp arr g-p gaa gag gao gap gar gga ggg ggo ggp ggr goa gog goo gop gor gpa gpg gpo gpp gpr gra grg gro grp grr oaa oag oao oap oar oga ogg ogo ogp oo- ooa oog ooo oop oor op- opa opg opo opp opr or- ora org oro orp orr p-p paa pag pao pap par pga pgg pgo pgp pgr poa pog poo pop por ppa ppg ppo ppp ppr pra prg pro prp prr ra- raa rag rao rap rar rga rgg rgo rgp rgr roa rog roo rop ror rpa rpg rpo rpp rpr rra rrg rrp rrr