ddd dde ddf ddl ddm de- ded dee def del dem dfd dfe dff dfl dfm dl- dld dle dlf dll dlm dmd dme dmf dml dmm ed- edd ede edf edl edm eed eee eef eel eem ef- efd efe eff efl efm eld ele elf ell elm em- emd eme emf eml emm fdd fde fdf fdl fdm fed fee fef fel fem ffd ffe fff ffl ffm fld fle flf fll flm fmd fme fmf fml fmm ldd lde ldf ldl ldm led lee lef lel lem lfd lfe lff lfl lfm lld lle llf lll llm lmd lme lmf lml lmm m-f mdd mde mdf mdl mdm med mee mef mel mem mfd mfe mff mfl mfm mld mle mlf mll mlm mmd mme mmf mml mmm