ddd ddf ddg ddo ddr dds dfd dff dfg dfo dfr dfs dgd dgf dgg dgr dgs dod dof dog doo dor dos drd drg dro drr drs dsd dsf dsg dso dsr dss fdd fdf fdg fdo fdr fds ffd fff ffg ffo ffr ffs fgd fgf fgg fgr fgs fof fog foo for fos frd frf frg fro frr frs fsd fsf fsg fso fsr fss g-d gdd gdf gdo gdr gds gfd gff gfo gfr gfs ggd ggg ggo ggr ggs god gof gog goo gor gos grd grf grg gro grr grs gsd gsf gsg gso gsr gss odd odf odg odo odr ods of- ofd off ofg ofo ofr ofs ogd ogf ogg ogo ogs oo- ood oof oog ooo oor oos or- ord orf org oro orr ors os- osd osf osg oso osr oss rdd rdf rdg rdo rdr rds rfd rff rfg rfo rfr rfs rgd rgf rgg rgo rgr rgs rod rof rog roo ror ros rrd rrf rrg rrr rrs rsd rsf rsg rso rsr rss sdd sdf sdg sdo sdr sds sfd sff sfg sfo sfr sfs sgd sgf sgg sgo sgr sgs sod sof sog soo sor sos sr- srd srf srg sro srr srs ss- ssd ssf ssg sso ssr sss