a-a a-z aaa aaf aam aan aar aaz af- afa aff afm afn afr afz ama amf amm amn amr amz an- ana anf anm ann anr anz ar- ara arf arm arn arr arz az- aza azf azm azn azz faa faf fam fan far faz ffa fff ffm ffn ffr ffz fma fmf fmm fmn fmr fna fnf fnm fnn fnr fnz fra frf frm frn frr m-f m-r maa maf mam man mar maz mfa mff mfm mfn mfr mfz mma mmf mmm mmn mmr mmz mna mnf mnm mnn mnr mnz mra mrf mrm mrn mrr mrz mza mzf mzm mzn naa naf nam nan nar naz nfa nff nfn nfr nma nmm nmn nmr nmz nna nnf nnm nnn nnz nra nrf nrm nrn nrr nrz nzf nzz ra- raa raf ram ran rar raz rfa rff rfm rfn rfr rfz rma rmf rmm rmn rmr rna rnm rnn rnr rnz rra rrf rrm rrn rrr rza rzm zaa zaf zam zan zar zaz zfa zfn zfr zma zmm znn zzr zzz