a-a aaa aad aaf aag aah ad- ada add adf adg adh af- afa afd aff afg afh ag- aga agd agf agg agh aha ahd ahf ahg ahh daa dad daf dag dah dda ddd ddf ddg ddh dfa dfd dff dfg dfh dga dgd dgf dgg dgh dh- dha dhd dhf dhh faa fad faf fag fah fda fdd fdf fdg fdh ffa ffd fff ffg ffh fga fgd fgf fgg fgh fha fhf fhg fhh g-d gaa gad gaf gag gah gda gdd gdf gdh gfa gfd gff gfh gga ggd ggg ggh gha ghd ghg ghh haa had haf hag hah hda hdd hdf hdg hdh hfa hfd hff hfg hfh hga hgf hgg hgh hha hhd hhf hhg hhh