a-a a-b a-z aaa aab aam aan aar aaz ab- aba abb abm abn abr abz ama amb amm amn amr amz an- ana anb anm ann anr anz ar- ara arb arm arn arr arz az- aza azb azm azn azz baa bab bam ban bar baz bba bbb bbm bbn bbr bma bmb bmm bmn bmr bmz bna bnb bnn bnr bnz bra brb brm brn brr brz bza bzn bzr bzz m-r maa mab mam man mar maz mba mbb mbm mbr mma mmb mmm mmn mmr mmz mna mnb mnm mnn mnr mnz mra mrb mrm mrn mrr mrz mza mzb mzm mzn naa nab nam nan nar naz nba nbb nbm nbn nbr nma nmb nmm nmn nmr nmz nna nnb nnm nnn nnz nra nrb nrm nrn nrr nrz nzb nzz ra- raa rab ram ran rar raz rba rbb rbm rbn rbr rma rmb rmm rmn rmr rna rnb rnm rnn rnr rnz rra rrb rrm rrn rrr rza rzb rzm zaa zab zam zan zar zaz zbb zbm zbr zma zmb zmm znn zzr zzz