-er -up ddd dde ddi ddp ddr ddu de- ded dee dei dep der deu di- did die dii dip dir diu dpd dpe dpi dpp dpr dpu drd dre dri drp drr dru dud due dui dup dur ed- edd ede edi edp edr edu eed eee eep eer eid eie eii eip eir eiu ep- epd epe epi epp epr epu erd ere eri erp err eru eu- eud eue eui eup eur i-d idd ide idi idp idr idu ie- ied iee iei iep ier iid iie iii iip iir iiu ipd ipe ipi ipp ipr ipu ir- ird ire iri irp irr iru iu- iud iue iui iup iur p-p pdd pde pdi pdp pdr pdu ped pee pei pep per peu pid pie pii pip pir piu ppd ppe ppi ppp ppr ppu prd pre pri prp prr pru pud pue pui pup pur puu rdd rde rdi rdp rdr rdu re- red ree rei rep rer reu rid rie rii rip rir rpd rpe rpi rpp rpr rpu rrd rri rrp rrr rru rud rue rui rup rur ruu udd ude udi udp udr udu ued uee uei uep uer uid uie uii uip uir uiu up- upd upe upi upp upr upu ur- urd ure uri urp urr uru uue uur uuu