a-a aaa aad aae aaf aao aas ad- ada add ade adf ado ads aea aed aee aef aeo aes af- afa afd afe aff afo afs aoa aod aoe aof aoo aos as- asa asd ase asf aso ass daa dad dae daf dao das dda ddd dde ddf ddo dds de- dea ded dee def deo des dfa dfd dfe dff dfo dfs doa dod doe dof doo dos dsa dsd dse dsf dso dss eaa ead eae eaf eao eas ed- eda edd ede edf edo eds eea eed eee eef eeo ees ef- efa efd efe eff efo efs eo- eoa eod eoe eof eoo eos es- esa esd ese esf eso ess faa fad fae faf fao fas fda fdd fde fdf fdo fds fea fed fee fef feo fes ffa ffd ffe fff ffo ffs foa foe fof foo fos fsa fsd fse fsf fso fss oaa oad oae oaf oao oas oda odd ode odf odo ods oea oed oee oef oeo oes of- ofa ofd ofe off ofo ofs oo- ooa ood oof ooo oos os- osa osd ose osf oso oss saa sad sae saf sao sas sda sdd sde sdf sdo sds se- sea sed see sef seo ses sfa sfd sfe sff sfo sfs soa sod soe sof soo sos ss- ssa ssd sse ssf sso sss