ddd dde ddf ddm ddo dds de- ded dee def dem deo des dfd dfe dff dfm dfo dfs dmd dme dmf dmm dmo dms dod doe dof dom doo dos dsd dse dsf dsm dso dss ed- edd ede edf edm edo eds eed eee eef eem eeo ees ef- efd efe eff efm efo efs em- emd eme emf emm emo ems eo- eod eoe eof eom eoo eos es- esd ese esf esm eso ess fdd fde fdf fdm fdo fds fed fee fef fem feo fes ffd ffe fff ffm ffo ffs fmd fme fmf fmm fmo fms foe fof fom foo fos fsd fse fsf fsm fso fss m-f m-o mdd mde mdf mdm mdo mds med mee mef mem meo mes mfd mfe mff mfm mfo mfs mmd mme mmf mmm mmo mms mod moe mof mom moo mos msd mse msf msm mso mss odd ode odf odm odo ods oed oee oef oem oeo oes of- ofd ofe off ofm ofo ofs om- omd ome omf omm omo oms oo- ood oof oom ooo oos os- osd ose osf osm oso oss sdd sde sdf sdm sdo sds se- sed see sef sem seo ses sfd sfe sff sfm sfo sfs smd sme smf smm smo sms sod soe sof som soo sos ss- ssd sse ssf ssm sso sss