-er -ic -up c-- ccc ccd cce cci ccp ccr ccu cdc cdd cde cdi cdp cdr cdu ce- cec ced cee cei cep cer ceu ci- cic cid cie cii cip cir ciu cpc cpd cpe cpi cpp cpr cpu crc crd cre cri crp crr cru cuc cud cue cui cup cur cuu dcc dcd dce dci dcp dcr dcu ddc ddd dde ddi ddp ddr ddu de- dec ded dee dei dep der deu di- dic did die dii dip dir diu dpc dpd dpe dpi dpp dpr dpu drc drd dre dri drp drr dru duc dud due dui dup dur ec- ecc ecd ece eci ecr ecu ed- edc edd ede edi edp edr edu eec eed eee eep eer eic eid eie eii eip eir eiu ep- epc epd epe epi epp epr epu erc erd ere eri erp err eru eu- euc eud eue eui eup eur i-d icc icd ice ici icp icr icu idc idd ide idi idp idr idu ie- iec ied iee iei iep ier iic iid iie iii iip iir iiu ipc ipd ipe ipi ipp ipr ipu ir- irc ird ire iri irp irr iru iu- iuc iud iue iui iup iur p-p pcc pcd pce pci pcp pcr pcu pdc pdd pde pdi pdp pdr pdu pec ped pee pei pep per peu pic pid pie pii pip pir piu ppc ppd ppe ppi ppp ppr ppu prc prd pre pri prp prr pru puc pud pue pui pup pur puu rcc rcd rce rci rcp rcr rcu rdc rdd rde rdi rdp rdr rdu re- rec red ree rei rep rer reu ric rid rie rii rip rir rpc rpd rpe rpi rpp rpr rpu rrc rrd rri rrp rrr rru ruc rud rue rui rup rur ruu ucc ucd uce uci ucp ucr ucu udc udd ude udi udp udr udu uec ued uee uei uep uer uic uid uie uii uip uir uiu up- upc upd upe upi upp upr upu ur- urc urd ure uri urp urr uru uuc uue uur uuu