-er -ic c-- ccc cce ccf cci ccp ccr ccs cct ce- cec cee cef cei cep cer ces cet cfc cfe cff cfi cfp cfr cfs cft ci- cic cie cif cii cip cir cis cit cpc cpe cpf cpi cpp cpr cps cpt crc cre crf cri crp crr crs crt csc cse csf csi csp csr css cst ctc cte ctf cti ctp ctr cts ctt ec- ecc ece ecf eci ecr ecs ect eec eee eef eep eer ees eet ef- efc efe eff efi efp efr efs eft eic eie eif eii eip eir eis eit ep- epc epe epf epi epp epr eps ept erc ere erf eri erp err ers ert es- esc ese esf esi esp esr ess est etc ete etf eti etp etr ets ett fcc fce fcf fci fcp fcr fcs fct fec fee fef fei fep fer fes fet ffc ffe fff ffi ffp ffr ffs fft fic fie fif fii fip fir fis fit fpc fpe fpi fpp fpr fps fpt frc fre frf fri frp frr frs frt fsc fse fsf fsi fsp fsr fss fst ftc fte ftf fti ftp ftr fts ftt i-f icc ice icf ici icp icr ics ict ie- iec iee ief iei iep ier ies iet ifc ife iff ifi ifp ifr ifs ift iic iie iif iii iip iir iis iit ipc ipe ipf ipi ipp ipr ips ipt ir- irc ire irf iri irp irr irs irt is- isc ise isf isi isp isr iss ist itc ite itf iti itp its itt p-p pcc pce pcf pci pcp pcr pcs pct pec pee pef pei pep per pes pet pfc pfe pff pfi pfp pfr pfs pft pic pie pif pii pip pir pis pit ppc ppe ppf ppi ppp ppr pps ppt prc pre prf pri prp prr prs prt ps- psc pse psf psi psp psr pss pst pt- ptc pte ptf pti ptp ptr pts ptt rcc rce rcf rci rcp rcr rcs rct re- rec ree ref rei rep rer res ret rfc rfe rff rfi rfp rfr rfs rft ric rie rif rii rip rir ris rit rpc rpe rpf rpi rpp rpr rps rpt rrc rrf rri rrp rrr rrs rrt rsc rse rsf rsi rsp rsr rss rst rtc rte rtf rti rtp rtr rts rtt scc sce scf sci scp scr scs sct se- sec see sef sei sep ser ses set sfc sfe sff sfi sfp sfr sfs sft sic sie sif sii sip sir sis sit spc spe spf spi spp spr sps spt sr- src sre srf sri srp srr srs srt ss- ssc sse ssf ssi ssp ssr sss sst stc ste stf sti stp str sts stt tcc tce tcf tci tcp tcr tcs tct te- tec tee tef tei tep ter tes tet tfc tfe tff tfi tfp tfr tfs tft tic tie tif tii tip tir tis tit tpc tpe tpf tpi tpp tpr tps tpt trc tre trf tri trp trr trs trt tsc tse tsf tsi tsp tsr tss tst ttc tte ttf tti ttp ttr tts ttt