-er a-a aaa aad aae aag aar ad- ada add ade adg adr aea aed aee aeg aer ag- aga agd age agg agr ar- ara ard are arg arr daa dad dae dag dar dda ddd dde ddg ddr de- dea ded dee deg der dga dgd dge dgg dgr dra drd dre drg drr eaa ead eae eag ear ed- eda edd ede edg edr eea eed eee eeg eer ega egd ege egg egr era erd ere erg err g-d gaa gad gae gag gar gda gdd gde gdr ge- gea ged gee geg ger gga ggd ggg ggr gra grd gre grg grr ra- raa rad rae rag rar rda rdd rde rdg rdr re- rea red ree reg rer rga rgd rge rgg rgr rra rrd rrg rrr