-er -ic -up c-- ccc cce cci ccp ccr ccu ce- cec cee cei cep cer ceu ci- cic cie cii cip cir ciu cpc cpe cpi cpp cpr cpu crc cre cri crp crr cru cuc cue cui cup cur cuu ec- ecc ece eci ecr ecu eec eee eep eer eic eie eii eip eir eiu ep- epc epe epi epp epr epu erc ere eri erp err eru eu- euc eue eui eup eur icc ice ici icp icr icu ie- iec iee iei iep ier iic iie iii iip iir iiu ipc ipe ipi ipp ipr ipu ir- irc ire iri irp irr iru iu- iuc iue iui iup iur p-p pcc pce pci pcp pcr pcu pec pee pei pep per peu pic pie pii pip pir piu ppc ppe ppi ppp ppr ppu prc pre pri prp prr pru puc pue pui pup pur puu rcc rce rci rcp rcr rcu re- rec ree rei rep rer reu ric rie rii rip rir rpc rpe rpi rpp rpr rpu rrc rri rrp rrr rru ruc rue rui rup rur ruu ucc uce uci ucp ucr ucu uec uee uei uep uer uic uie uii uip uir uiu up- upc upe upi upp upr upu ur- urc ure uri urp urr uru uuc uue uur uuu