ddd ddm ddn ddo dds dmd dmm dmn dmo dms dnd dnm dnn dno dns dod dom don doo dos dsd dsm dsn dso dss m-o mdd mdm mdn mdo mds mmd mmm mmn mmo mms mnm mnn mno mns mod mom mon moo mos msd msm msn mso mss ndd ndm ndn ndo nds nmd nmm nmn nmo nms nnm nnn nno nns no- nod nom non noo nos nsd nsm nsn nso nss odd odm odn odo ods om- omd omm omn omo oms on- ond onn ono ons oo- ood oom oon ooo oos os- osd osm osn oso oss sdd sdm sdn sdo sds smd smm smn smo sms snd snm snn sno sns sod som son soo sos ss- ssd ssm ssn sso sss