a-a aaa aad aaf aao aar aas ad- ada add adf ado adr ads af- afa afd aff afo afr afs aoa aod aof aoo aor aos ar- ara ard arf aro arr ars as- asa asd asf aso asr ass daa dad daf dao dar das dda ddd ddf ddo ddr dds dfa dfd dff dfo dfr dfs doa dod dof doo dor dos dra drd dro drr drs dsa dsd dsf dso dsr dss faa fad faf fao far fas fda fdd fdf fdo fdr fds ffa ffd fff ffo ffr ffs foa fof foo for fos fra frd frf fro frr frs fsa fsd fsf fso fsr fss oaa oad oaf oao oar oas oda odd odf odo odr ods of- ofa ofd off ofo ofr ofs oo- ooa ood oof ooo oor oos or- ora ord orf oro orr ors os- osa osd osf oso osr oss ra- raa rad raf rao rar ras rda rdd rdf rdo rdr rds rfa rfd rff rfo rfr rfs roa rod rof roo ror ros rra rrd rrf rrr rrs rsa rsd rsf rso rsr rss saa sad saf sao sar sas sda sdd sdf sdo sdr sds sfa sfd sff sfo sfr sfs soa sod sof soo sor sos sr- sra srd srf sro srr srs ss- ssa ssd ssf sso ssr sss