-er -ic c-- ccc cce cci ccp ccr ccs cct ce- cec cee cei cep cer ces cet ci- cic cie cii cip cir cis cit cpc cpe cpi cpp cpr cps cpt crc cre cri crp crr crs crt csc cse csi csp csr css cst ctc cte cti ctp ctr cts ctt ec- ecc ece eci ecr ecs ect eec eee eep eer ees eet eic eie eii eip eir eis eit ep- epc epe epi epp epr eps ept erc ere eri erp err ers ert es- esc ese esi esp esr ess est etc ete eti etp etr ets ett icc ice ici icp icr ics ict ie- iec iee iei iep ier ies iet iic iie iii iip iir iis iit ipc ipe ipi ipp ipr ips ipt ir- irc ire iri irp irr irs irt is- isc ise isi isp isr iss ist itc ite iti itp its itt p-p pcc pce pci pcp pcr pcs pct pec pee pei pep per pes pet pic pie pii pip pir pis pit ppc ppe ppi ppp ppr pps ppt prc pre pri prp prr prs prt ps- psc pse psi psp psr pss pst pt- ptc pte pti ptp ptr pts ptt rcc rce rci rcp rcr rcs rct re- rec ree rei rep rer res ret ric rie rii rip rir ris rit rpc rpe rpi rpp rpr rps rpt rrc rri rrp rrr rrs rrt rsc rse rsi rsp rsr rss rst rtc rte rti rtp rtr rts rtt scc sce sci scp scr scs sct se- sec see sei sep ser ses set sic sie sii sip sir sis sit spc spe spi spp spr sps spt sr- src sre sri srp srr srs srt ss- ssc sse ssi ssp ssr sss sst stc ste sti stp str sts stt tcc tce tci tcp tcr tcs tct te- tec tee tei tep ter tes tet tic tie tii tip tir tis tit tpc tpe tpi tpp tpr tps tpt trc tre tri trp trr trs trt tsc tse tsi tsp tsr tss tst ttc tte tti ttp ttr tts ttt