ddd ddf ddn ddo dds dfd dff dfn dfo dfs dnd dnf dnn dno dns dod dof don doo dos dsd dsf dsn dso dss fdd fdf fdn fdo fds ffd fff ffn ffo ffs fnd fnf fnn fns fof fon foo fos fsd fsf fsn fso fss ndd ndf ndn ndo nds nfd nff nfn nfo nfs nnf nnn nno nns no- nod nof non noo nos nsd nsf nsn nso nss odd odf odn odo ods of- ofd off ofn ofo ofs on- ond onf onn ono ons oo- ood oof oon ooo oos os- osd osf osn oso oss sdd sdf sdn sdo sds sfd sff sfn sfo sfs snd snf snn sno sns sod sof son soo sos ss- ssd ssf ssn sso sss