a-a a-z aaa aad aan aar aaz ad- ada add adn adr adz an- ana and ann anr anz ar- ara ard arn arr arz az- aza azd azn azz daa dad dan dar daz dda ddd ddn ddr ddz dna dnd dnn dnr dnz dra drd drn drr drz dza dzd dzr naa nad nan nar naz nda ndd ndn ndr nna nnn nnz nra nrd nrn nrr nrz nzd nzz ra- raa rad ran rar raz rda rdd rdn rdr rna rnd rnn rnr rnz rra rrd rrn rrr rza zaa zad zan zar zaz znd znn zzr zzz