a-a aaa aad aaf aag aar ad- ada add adf adg adr af- afa afd aff afg afr ag- aga agd agf agg agr ar- ara ard arf arg arr daa dad daf dag dar dda ddd ddf ddg ddr dfa dfd dff dfg dfr dga dgd dgf dgg dgr dra drd drg drr faa fad faf fag far fda fdd fdf fdg fdr ffa ffd fff ffg ffr fga fgd fgf fgg fgr fra frd frf frg frr g-d gaa gad gaf gag gar gda gdd gdf gdr gfa gfd gff gfr gga ggd ggg ggr gra grd grf grg grr ra- raa rad raf rag rar rda rdd rdf rdg rdr rfa rfd rff rfg rfr rga rgd rgf rgg rgr rra rrd rrf rrg rrr