-er -ic c-- ccc cce cci ccp ccr ccs cct ccx ce- cec cee cei cep cer ces cet cex ci- cic cie cii cip cir cis cit cix cpc cpe cpi cpp cpr cps cpt cpx crc cre cri crp crr crs crt crx csc cse csi csp csr css cst csx ctc cte cti ctp ctr cts ctt ctx cxc cxi cxp cxr cxs cxt cxx ec- ecc ece eci ecr ecs ect ecx eec eee eep eer ees eet eex eic eie eii eip eir eis eit eix ep- epc epe epi epp epr eps ept epx erc ere eri erp err ers ert es- esc ese esi esp esr ess est esx etc ete eti etp etr ets ett etx ex- exc exe exi exp exr exs ext exx icc ice ici icp icr ics ict ie- iec iee iei iep ier ies iet iex iic iie iii iip iir iis iit iix ipc ipe ipi ipp ipr ips ipt ipx ir- irc ire iri irp irr irs irt irx is- isc ise isi isp isr iss ist itc ite iti itp its itt itx ixc ixe ixi p-p pcc pce pci pcp pcr pcs pct pcx pec pee pei pep per pes pet pex pic pie pii pip pir pis pit pix ppc ppe ppi ppp ppr pps ppt ppx prc pre pri prp prr prs prt prx ps- psc pse psi psp psr pss pst psx pt- ptc pte pti ptp ptr pts ptt ptx pxc pxe pxr pxs pxt rcc rce rci rcp rcr rcs rct rcx re- rec ree rei rep rer res ret rex ric rie rii rip rir ris rit rix rpc rpe rpi rpp rpr rps rpt rpx rrc rri rrp rrr rrs rrt rsc rse rsi rsp rsr rss rst rsx rtc rte rti rtp rtr rts rtt rtx rxp rxr rxs scc sce sci scp scr scs sct scx se- sec see sei sep ser ses set sex sic sie sii sip sir sis sit six spc spe spi spp spr sps spt spx sr- src sre sri srp srr srs srt srx ss- ssc sse ssi ssp ssr sss sst ssx stc ste sti stp str sts stt stx sxc sxi sxs sxt t-x tcc tce tci tcp tcr tcs tct tcx te- tec tee tei tep ter tes tet tex tic tie tii tip tir tis tit tix tpc tpe tpi tpp tpr tps tpt tpx trc tre tri trp trr trs trt trx tsc tse tsi tsp tsr tss tst tsx ttc tte tti ttp ttr tts ttt ttx txe txi txs txt xci xcp xcr xcx xee xep xer xes xet xex xic xie xii xis xit xix xpc xpe xpp xps xpt xrc xrt xrx xsc xsi xsp xss xst xtc xti xtp xtr xts xtx xxi xxp xxx