a-a a-z aaa aag aao aar aaz ag- aga agg ago agr agz aoa aog aoo aor ar- ara arg aro arr arz az- aza azg azo azz gaa gag gao gar gaz gga ggg ggo ggr ggz goa gog goo gor goz gra grg gro grr gza gzo gzr oaa oag oao oar oga ogg ogo oo- ooa oog ooo oor or- ora org oro orr orz oza ozo ozz ra- raa rag rao rar raz rga rgg rgo rgr roa rog roo ror roz rra rrg rrr rza rzo z-g zaa zag zao zar zaz zgg zo- zoa zog zoo zor zro zzr zzz