ddd dde ddf ddi ddk dds de- ded dee def dei dek des dfd dfe dff dfi dfk dfs di- did die dif dii dik dis dke dki dkk dks dsd dse dsf dsi dsk dss ed- edd ede edf edi edk eds eed eee eef eek ees ef- efd efe eff efi efs eid eie eif eii eik eis ekd eke ekf eki eks es- esd ese esf esi esk ess fdd fde fdf fdi fdk fds fed fee fef fei fek fes ffd ffe fff ffi ffk ffs fid fie fif fii fik fis fkf fki fkk fsd fse fsf fsi fsk fss i-d i-f idd ide idf idi idk ids ie- ied iee ief iei iek ies ifd ife iff ifi ifs iid iie iif iii iis ike ikf iki ikk iks is- isd ise isf isi isk iss kde kdf kdk kds ke- ked kee kef kei kek kes kfd kff kfi kfs kid kie kif kii kik kis kke kki kkk kks ksd kse ksf ksi ksk kss sdd sde sdf sdi sdk sds se- sed see sef sei sek ses sfd sfe sff sfi sfk sfs sid sie sif sii sik sis sk- skd ske skf ski skk sks ss- ssd sse ssf ssi ssk sss