-er -ic c-- ccc cce cci ccl ccr ccs ccx ce- cec cee cei cel cer ces cex ci- cic cie cii cil cir cis cix cl- clc cle cli cll clr cls clx crc cre cri crl crr crs crx csc cse csi csl csr css csx cxc cxi cxl cxr cxs cxx ec- ecc ece eci ecl ecr ecs ecx eec eee eel eer ees eex eic eie eii eil eir eis eix elc ele eli ell elr els elx erc ere eri erl err ers es- esc ese esi esl esr ess esx ex- exc exe exi exl exr exs exx icc ice ici icl icr ics ie- iec iee iei iel ier ies iex iic iie iii iil iir iis iix il- ilc ile ili ill ilr ils ilx ir- irc ire iri irl irr irs irx is- isc ise isi isl isr iss ixc ixe ixi ixl lcc lce lci lcl lcr lcs lcx lec lee lei lel ler les lex lic lie lii lil lir lis lix llc lle lli lll llr lls lrc lri lrr lrs lsc lse lsi lsl lsr lss lxc lxi lxr lxx rcc rce rci rcl rcr rcs rcx re- rec ree rei rel rer res rex ric rie rii ril rir ris rix rlc rle rli rll rlr rls rrc rri rrl rrr rrs rsc rse rsi rsl rsr rss rsx rxr rxs scc sce sci scl scr scs scx se- sec see sei sel ser ses sex sic sie sii sil sir sis six slc sle sli sll slr sls slx sr- src sre sri srl srr srs srx ss- ssc sse ssi ssl ssr sss ssx sxc sxi sxl sxs xci xcl xcr xcx xee xel xer xes xex xic xie xii xis xix xli xlr xls xrc xrx xsc xsi xsl xss xxi xxl xxx