a-a a-b a-z aaa aab aad aag aar aaz ab- aba abb abd abg abr abz ad- ada adb add adg adr adz ag- aga agb agd agg agr agz ar- ara arb ard arg arr arz az- aza azb azd azg azz baa bab bad bag bar baz bba bbb bbd bbg bbr bda bdb bdd bdg bdr bdz bga bgb bgd bgg bgr bgz bra brb brd brg brr brz bza bzd bzr bzz daa dab dad dag dar daz dba dbb dbd dbg dbr dbz dda ddb ddd ddg ddr ddz dga dgd dgg dgr dgz dra drb drd drg drr drz dza dzb dzd dzr g-d gaa gab gad gag gar gaz gba gbd gbg gbr gbz gda gdb gdd gdr gga ggb ggd ggg ggr ggz gra grb grd grg grr gza gzr ra- raa rab rad rag rar raz rba rbb rbd rbg rbr rda rdb rdd rdg rdr rga rgb rgd rgg rgr rra rrb rrd rrg rrr rza rzb z-g zaa zab zad zag zar zaz zbb zbr zgb zgg zzr zzz