-er a-a a-b a-z aaa aab aae aam aar aaz ab- aba abb abe abm abr abz aea aeb aee aem aer aez ama amb ame amm amr amz ar- ara arb are arm arr arz az- aza azb aze azm azz baa bab bae bam bar baz bba bbb bbe bbm bbr be- bea beb bee bem ber bez bma bmb bme bmm bmr bmz bra brb bre brm brr brz bza bze bzr bzz eaa eab eae eam ear eaz eba ebb ebe ebm ebr eea eeb eee eem eer em- ema emb eme emm emr era erb ere erm err erz eze ezr ezz m-r maa mab mae mam mar maz mba mbb mbe mbm mbr mea meb mee mem mer mez mma mmb mme mmm mmr mmz mra mrb mre mrm mrr mrz mza mzb mzm ra- raa rab rae ram rar raz rba rbb rbe rbm rbr re- rea reb ree rem rer rez rma rmb rme rmm rmr rra rrb rrm rrr rza rzb rze rzm zaa zab zam zar zaz zbb zbm zbr zea zeb zee zem zer zez zma zmb zmm zzr zzz