ddd ddf ddg ddo dds dfd dff dfg dfo dfs dgd dgf dgg dgs dod dof dog doo dos dsd dsf dsg dso dss fdd fdf fdg fdo fds ffd fff ffg ffo ffs fgd fgf fgg fgs fof fog foo fos fsd fsf fsg fso fss g-d gdd gdf gdo gds gfd gff gfo gfs ggd ggg ggo ggs god gof gog goo gos gsd gsf gsg gso gss odd odf odg odo ods of- ofd off ofg ofo ofs ogd ogf ogg ogo ogs oo- ood oof oog ooo oos os- osd osf osg oso oss sdd sdf sdg sdo sds sfd sff sfg sfo sfs sgd sgf sgg sgo sgs sod sof sog soo sos ss- ssd ssf ssg sso sss