-er ddd dde ddf ddi ddr dds ddz de- ded dee def dei der des dez dfd dfe dff dfi dfr dfs dfz di- did die dif dii dir dis diz drd dre dri drr drs drz dsd dse dsf dsi dsr dss dsz dzd dze dzi dzr dzs ed- edd ede edf edi edr eds eed eee eef eer ees ef- efd efe eff efi efr efs eid eie eif eii eir eis erd ere erf eri err ers erz es- esd ese esf esi esr ess eze ezf ezr ezs ezz fdd fde fdf fdi fdr fds fed fee fef fei fer fes fez ffd ffe fff ffi ffr ffs ffz fid fie fif fii fir fis fiz frd fre frf fri frr frs fsd fse fsf fsi fsr fss fzd i-d i-f idd ide idf idi idr ids ie- ied iee ief iei ier ies ifd ife iff ifi ifr ifs ifz iid iie iif iii iir iis ir- ird ire irf iri irr irs is- isd ise isf isi isr iss ize izi izz rdd rde rdf rdi rdr rds re- red ree ref rei rer res rez rfd rfe rff rfi rfr rfs rfz rid rie rif rii rir ris riz rrd rrf rri rrr rrs rsd rse rsf rsi rsr rss rze sdd sde sdf sdi sdr sds sdz se- sed see sef sei ser ses sez sfd sfe sff sfi sfr sfs sfz sid sie sif sii sir sis sr- srd sre srf sri srr srs ss- ssd sse ssf ssi ssr sss ssz szd sze szi szr zdf zds zed zee zef zer zes zez zfd zfr zfs zid zie zif zir zis ziz zrs zse zsi zsz zzr zzs zzz