a-a aaa aad aae aaf aas ad- ada add ade adf ads aea aed aee aef aes af- afa afd afe aff afs as- asa asd ase asf ass daa dad dae daf das dda ddd dde ddf dds de- dea ded dee def des dfa dfd dfe dff dfs dsa dsd dse dsf dss eaa ead eae eaf eas ed- eda edd ede edf eds eea eed eee eef ees ef- efa efd efe eff efs es- esa esd ese esf ess faa fad fae faf fas fda fdd fde fdf fds fea fed fee fef fes ffa ffd ffe fff ffs fsa fsd fse fsf fss saa sad sae saf sas sda sdd sde sdf sds se- sea sed see sef ses sfa sfd sfe sff sfs ss- ssa ssd sse ssf sss