a-a aaa aad aaf aag aas ad- ada add adf adg ads af- afa afd aff afg afs ag- aga agd agf agg ags as- asa asd asf asg ass daa dad daf dag das dda ddd ddf ddg dds dfa dfd dff dfg dfs dga dgd dgf dgg dgs dsa dsd dsf dsg dss faa fad faf fag fas fda fdd fdf fdg fds ffa ffd fff ffg ffs fga fgd fgf fgg fgs fsa fsd fsf fsg fss g-d gaa gad gaf gag gas gda gdd gdf gds gfa gfd gff gfs gga ggd ggg ggs gsa gsd gsf gsg gss saa sad saf sag sas sda sdd sdf sdg sds sfa sfd sff sfg sfs sga sgd sgf sgg sgs ss- ssa ssd ssf ssg sss