a-a a-z aaa aad aag aar aaz ad- ada add adg adr adz ag- aga agd agg agr agz ar- ara ard arg arr arz az- aza azd azg azz daa dad dag dar daz dda ddd ddg ddr ddz dga dgd dgg dgr dgz dra drd drg drr drz dza dzd dzr g-d gaa gad gag gar gaz gda gdd gdr gga ggd ggg ggr ggz gra grd grg grr gza gzr ra- raa rad rag rar raz rda rdd rdg rdr rga rgd rgg rgr rra rrd rrg rrr rza z-g zaa zad zag zar zaz zgg zzr zzz