a-a aaa aad aaf aag aap ad- ada add adf adg adp af- afa afd aff afg afp ag- aga agd agf agg agp ap- apa apd apf apg app daa dad daf dag dap dda ddd ddf ddg ddp dfa dfd dff dfg dfp dga dgd dgf dgg dgp dpa dpd dpf dpg dpp faa fad faf fag fap fda fdd fdf fdg fdp ffa ffd fff ffg ffp fga fgd fgf fgg fgp fpa fpd fpg fpp g-d g-p gaa gad gaf gag gap gda gdd gdf gdp gfa gfd gff gfp gga ggd ggg ggp gpa gpd gpf gpg gpp p-p paa pad paf pag pap pda pdd pdf pdg pdp pfa pfd pff pfg pfp pga pgd pgf pgg pgp ppa ppd ppf ppg ppp