a-a aaa aad aaf aag aao aas ad- ada add adf adg ado ads af- afa afd aff afg afo afs ag- aga agd agf agg ago ags aoa aod aof aog aoo aos as- asa asd asf asg aso ass daa dad daf dag dao das dda ddd ddf ddg ddo dds dfa dfd dff dfg dfo dfs dga dgd dgf dgg dgs doa dod dof dog doo dos dsa dsd dsf dsg dso dss faa fad faf fag fao fas fda fdd fdf fdg fdo fds ffa ffd fff ffg ffo ffs fga fgd fgf fgg fgs foa fof fog foo fos fsa fsd fsf fsg fso fss g-d gaa gad gaf gag gao gas gda gdd gdf gdo gds gfa gfd gff gfo gfs gga ggd ggg ggo ggs goa god gof gog goo gos gsa gsd gsf gsg gso gss oaa oad oaf oag oao oas oda odd odf odg odo ods of- ofa ofd off ofg ofo ofs oga ogd ogf ogg ogo ogs oo- ooa ood oof oog ooo oos os- osa osd osf osg oso oss saa sad saf sag sao sas sda sdd sdf sdg sdo sds sfa sfd sff sfg sfo sfs sga sgd sgf sgg sgo sgs soa sod sof sog soo sos ss- ssa ssd ssf ssg sso sss