-er a-a a-b a-z aaa aab aad aae aam aar aaz ab- aba abb abd abe abm abr abz ad- ada adb add ade adm adr adz aea aeb aed aee aem aer aez ama amb amd ame amm amr amz ar- ara arb ard are arm arr arz az- aza azb azd aze azm azz baa bab bad bae bam bar baz bba bbb bbd bbe bbm bbr bda bdb bdd bde bdm bdr bdz be- bea beb bed bee bem ber bez bma bmb bmd bme bmm bmr bmz bra brb brd bre brm brr brz bza bzd bze bzr bzz daa dab dad dae dam dar daz dba dbb dbd dbe dbm dbr dbz dda ddb ddd dde ddm ddr ddz de- dea deb ded dee dem der dez dma dmb dmd dme dmm dmr dmz dra drb drd dre drm drr drz dza dzb dzd dze dzr eaa eab ead eae eam ear eaz eba ebb ebd ebe ebm ebr ed- eda edb edd ede edm edr eea eeb eed eee eem eer em- ema emb emd eme emm emr era erb erd ere erm err erz eze ezr ezz m-r maa mab mad mae mam mar maz mba mbb mbd mbe mbm mbr mda mdb mdd mde mdm mdr mdz mea meb med mee mem mer mez mma mmb mmd mme mmm mmr mmz mra mrb mrd mre mrm mrr mrz mza mzb mzm ra- raa rab rad rae ram rar raz rba rbb rbd rbe rbm rbr rda rdb rdd rde rdm rdr re- rea reb red ree rem rer rez rma rmb rmd rme rmm rmr rra rrb rrd rrm rrr rza rzb rze rzm zaa zab zad zam zar zaz zbb zbm zbr zdm zea zeb zed zee zem zer zez zma zmb zmd zmm zzr zzz