a-a a-b a-z aaa aab aad aae aam aau aaz ab- aba abb abd abe abm abu abz ad- ada adb add ade adm adu adz aea aeb aed aee aem aeu aez ama amb amd ame amm amu amz au- aua aub aud aue aum auz az- aza azb azd aze azm azu azz b-u baa bab bad bae bam bau baz bba bbb bbd bbe bbm bbu bda bdb bdd bde bdm bdu bdz be- bea beb bed bee bem beu bez bma bmb bmd bme bmm bmu bmz bua bub bud bue bum buu buz bza bzd bze bzu bzz daa dab dad dae dam dau daz dba dbb dbd dbe dbm dbu dbz dda ddb ddd dde ddm ddu ddz de- dea deb ded dee dem deu dez dma dmb dmd dme dmm dmu dmz dua dub dud due dum duz dza dzb dzd dze dzu eaa eab ead eae eam eau eaz eba ebb ebd ebe ebm ebu ed- eda edb edd ede edm edu eea eeb eed eee eem em- ema emb emd eme emm emu eu- eua eub eud eue eze ezz maa mab mad mae mam mau maz mba mbb mbd mbe mbm mbu mda mdb mdd mde mdm mdu mdz mea meb med mee mem meu mez mma mmb mmd mme mmm mmu mmz mua mub mud mue mum muu mza mzb mzm ua- uaa uab uad uae uam uau uaz uba ubb ube ubu uda udb udd ude udm udu uea ueb ued uee uem um- uma umb umd ume umm umu uua uue uum uuu uza uzb uzu zaa zab zad zam zaz zbb zbm zdm zea zeb zed zee zem zez zma zmb zmd zmm zub zud zum zuz zzz