-er ddd dde ddf ddi ddr de- ded dee def dei der dfd dfe dff dfi dfr di- did die dif dii dir drd dre dri drr ed- edd ede edf edi edr eed eee eef eer ef- efd efe eff efi efr eid eie eif eii eir erd ere erf eri err fdd fde fdf fdi fdr fed fee fef fei fer ffd ffe fff ffi ffr fid fie fif fii fir frd fre frf fri frr i-d i-f idd ide idf idi idr ie- ied iee ief iei ier ifd ife iff ifi ifr iid iie iif iii iir ir- ird ire irf iri irr rdd rde rdf rdi rdr re- red ree ref rei rer rfd rfe rff rfi rfr rid rie rif rii rir rrd rrf rri rrr