a-a a-b a-q a-z aaa aab aad aaq aar aaz ab- aba abb abd abq abr abz ad- ada adb add adq adr adz aqa aqr ar- ara arb ard arq arr arz az- aza azb azd azq azz baa bab bad baq bar baz bba bbb bbd bbq bbr bda bdb bdd bdq bdr bdz bqd bra brb brd brq brr brz bza bzd bzr bzz daa dab dad daq dar daz dba dbb dbd dbq dbr dbz dda ddb ddd ddq ddr ddz dqa dra drb drd drq drr drz dza dzb dzd dzr qaa qad qar qaz qba qbd qbq qda qdb qdr qqq qra qrb ra- raa rab rad raq rar raz rba rbb rbd rbr rda rdb rdd rdr rra rrb rrd rrq rrr rza rzb zaa zab zad zaq zar zaz zbb zbr zzr zzz