-er -ey -ic c-- ccc cce cci ccp ccr ccx ce- cec cee cei cep cer cex cey ci- cic cie cii cip cir cix cpc cpe cpi cpp cpr cpx crc cre cri crp crr crx cry cxc cxi cxp cxr cxx cyc cye cyp cyr ec- ecc ece eci ecr ecx eec eee eep eer eex eey eic eie eii eip eir eix ep- epc epe epi epp epr epx erc ere eri erp err ery ex- exc exe exi exp exr exx exy eyc eye eyp eyr icc ice ici icp icr icy ie- iec iee iei iep ier iex iey iic iie iii iip iir iix ipc ipe ipi ipp ipr ipx ipy ir- irc ire iri irp irr irx iry ixc ixe ixi ixy iyc iye iyr iyy p-p pcc pce pci pcp pcr pcx pec pee pei pep per pex pey pic pie pii pip pir pix ppc ppe ppi ppp ppr ppx prc pre pri prp prr prx pry pxc pxe pxr py- pyc pye pyr pyx rcc rce rci rcp rcr rcx re- rec ree rei rep rer rex rey ric rie rii rip rir rix riy rpc rpe rpi rpp rpr rpx rrc rri rrp rrr rxp rxr ry- ryc rye ryr ryy xci xcp xcr xcx xee xep xer xex xic xie xii xix xpc xpe xpp xrc xrx xry xxi xxp xxx xxy xyp xyr xyy ycc yce yci ycp ycy yec yee yei yep yer yex yey yie yii yip yir yrc yre yrp yxe yxy yyc yye yyy