a-a a-z aaa aad aae aaf aam aao aaz ad- ada add ade adf adm ado adz aea aed aee aef aem aeo aez af- afa afd afe aff afm afo afz ama amd ame amf amm amo amz aoa aod aoe aof aom aoo az- aza azd aze azf azm azo azz daa dad dae daf dam dao daz dda ddd dde ddf ddm ddo ddz de- dea ded dee def dem deo dez dfa dfd dfe dff dfm dfo dfz dma dmd dme dmf dmm dmo dmz doa dod doe dof dom doo doz dza dzd dze dzo eaa ead eae eaf eam eao eaz ed- eda edd ede edf edm edo eea eed eee eef eem eeo ef- efa efd efe eff efm efo em- ema emd eme emf emm emo eo- eoa eod eoe eof eom eoo eze ezf ezo ezz faa fad fae faf fam fao faz fda fdd fde fdf fdm fdo fea fed fee fef fem feo fez ffa ffd ffe fff ffm ffo ffz fma fmd fme fmf fmm fmo foa foe fof fom foo foz fzd m-f m-o maa mad mae maf mam mao maz mda mdd mde mdf mdm mdo mdz mea med mee mef mem meo mez mfa mfd mfe mff mfm mfo mfz mma mmd mme mmf mmm mmo mmz moa mod moe mof mom moo moz mza mzf mzm oaa oad oae oaf oam oao oda odd ode odf odm odo oea oed oee oef oem oeo of- ofa ofd ofe off ofm ofo ofz om- oma omd ome omf omm omo omz oo- ooa ood oof oom ooo oza oze ozm ozo ozz zaa zad zaf zam zao zaz zdf zdm zea zed zee zef zem zeo zez zfa zfd zma zmd zmm zo- zoa zod zoe zof zom zoo zzz