-er -ic -up c-- ccc cce cci ccp ccr ccu ccx ce- cec cee cei cep cer ceu cex ci- cic cie cii cip cir ciu cix cpc cpe cpi cpp cpr cpu cpx crc cre cri crp crr cru crx cuc cue cui cup cur cuu cxc cxi cxp cxr cxx ec- ecc ece eci ecr ecu ecx eec eee eep eer eex eic eie eii eip eir eiu eix ep- epc epe epi epp epr epu epx erc ere eri erp err eru eu- euc eue eui eup eur eux ex- exc exe exi exp exr exu exx icc ice ici icp icr icu ie- iec iee iei iep ier iex iic iie iii iip iir iiu iix ipc ipe ipi ipp ipr ipu ipx ir- irc ire iri irp irr iru irx iu- iuc iue iui iup iur ixc ixe ixi p-p pcc pce pci pcp pcr pcu pcx pec pee pei pep per peu pex pic pie pii pip pir piu pix ppc ppe ppi ppp ppr ppu ppx prc pre pri prp prr pru prx puc pue pui pup pur puu pxc pxe pxr rcc rce rci rcp rcr rcu rcx re- rec ree rei rep rer reu rex ric rie rii rip rir rix rpc rpe rpi rpp rpr rpu rpx rrc rri rrp rrr rru ruc rue rui rup rur ruu rux rxp rxr ucc uce uci ucp ucr ucu uec uee uei uep uer uic uie uii uip uir uiu up- upc upe upi upp upr upu upx ur- urc ure uri urp urr uru urx uuc uue uur uuu uxc uxr uxu xci xcp xcr xcx xee xep xer xeu xex xic xie xii xiu xix xpc xpe xpp xrc xrx xue xui xup xxi xxp xxx