a-a aaa aad aae aaf aag ad- ada add ade adf adg aea aed aee aef aeg af- afa afd afe aff afg ag- aga agd age agf agg daa dad dae daf dag dda ddd dde ddf ddg de- dea ded dee def deg dfa dfd dfe dff dfg dga dgd dge dgf dgg eaa ead eae eaf eag ed- eda edd ede edf edg eea eed eee eef eeg ef- efa efd efe eff efg ega egd ege egf egg faa fad fae faf fag fda fdd fde fdf fdg fea fed fee fef feg ffa ffd ffe fff ffg fga fgd fge fgf fgg g-d gaa gad gae gaf gag gda gdd gde gdf ge- gea ged gee gef geg gfa gfd gfe gff gga ggd ggg