a-a aaa aad aaf aag aao aar ad- ada add adf adg ado adr af- afa afd aff afg afo afr ag- aga agd agf agg ago agr aoa aod aof aog aoo aor ar- ara ard arf arg aro arr daa dad daf dag dao dar dda ddd ddf ddg ddo ddr dfa dfd dff dfg dfo dfr dga dgd dgf dgg dgr doa dod dof dog doo dor dra drd drg dro drr faa fad faf fag fao far fda fdd fdf fdg fdo fdr ffa ffd fff ffg ffo ffr fga fgd fgf fgg fgr foa fof fog foo for fra frd frf frg fro frr g-d gaa gad gaf gag gao gar gda gdd gdf gdo gdr gfa gfd gff gfo gfr gga ggd ggg ggo ggr goa god gof gog goo gor gra grd grf grg gro grr oaa oad oaf oag oao oar oda odd odf odg odo odr of- ofa ofd off ofg ofo ofr oga ogd ogf ogg ogo oo- ooa ood oof oog ooo oor or- ora ord orf org oro orr ra- raa rad raf rag rao rar rda rdd rdf rdg rdo rdr rfa rfd rff rfg rfo rfr rga rgd rgf rgg rgo rgr roa rod rof rog roo ror rra rrd rrf rrg rrr