a-a aaa aad aae aaf aag aao ad- ada add ade adf adg ado aea aed aee aef aeg aeo af- afa afd afe aff afg afo ag- aga agd age agf agg ago aoa aod aoe aof aog aoo daa dad dae daf dag dao dda ddd dde ddf ddg ddo de- dea ded dee def deg deo dfa dfd dfe dff dfg dfo dga dgd dge dgf dgg doa dod doe dof dog doo eaa ead eae eaf eag eao ed- eda edd ede edf edg edo eea eed eee eef eeg eeo ef- efa efd efe eff efg efo ega egd ege egf egg ego eo- eoa eod eoe eof eog eoo faa fad fae faf fag fao fda fdd fde fdf fdg fdo fea fed fee fef feg feo ffa ffd ffe fff ffg ffo fga fgd fge fgf fgg foa foe fof fog foo g-d gaa gad gae gaf gag gao gda gdd gde gdf gdo ge- gea ged gee gef geg geo gfa gfd gfe gff gfo gga ggd ggg ggo goa god goe gof gog goo oaa oad oae oaf oag oao oda odd ode odf odg odo oea oed oee oef oeg oeo of- ofa ofd ofe off ofg ofo oga ogd oge ogf ogg ogo oo- ooa ood oof oog ooo