-er -ic c-- ccc cce ccf cci ccr ccs cct ce- cec cee cef cei cer ces cet cfc cfe cff cfi cfr cfs cft ci- cic cie cif cii cir cis cit crc cre crf cri crr crs crt csc cse csf csi csr css cst ctc cte ctf cti ctr cts ctt ec- ecc ece ecf eci ecr ecs ect eec eee eef eer ees eet ef- efc efe eff efi efr efs eft eic eie eif eii eir eis eit erc ere erf eri err ers ert es- esc ese esf esi esr ess est etc ete etf eti etr ets ett fcc fce fcf fci fcr fcs fct fec fee fef fei fer fes fet ffc ffe fff ffi ffr ffs fft fic fie fif fii fir fis fit frc fre frf fri frr frs frt fsc fse fsf fsi fsr fss fst ftc fte ftf fti ftr fts ftt i-f icc ice icf ici icr ics ict ie- iec iee ief iei ier ies iet ifc ife iff ifi ifr ifs ift iic iie iif iii iir iis iit ir- irc ire irf iri irr irs irt is- isc ise isf isi isr iss ist itc ite itf iti its itt rcc rce rcf rci rcr rcs rct re- rec ree ref rei rer res ret rfc rfe rff rfi rfr rfs rft ric rie rif rii rir ris rit rrc rrf rri rrr rrs rrt rsc rse rsf rsi rsr rss rst rtc rte rtf rti rtr rts rtt scc sce scf sci scr scs sct se- sec see sef sei ser ses set sfc sfe sff sfi sfr sfs sft sic sie sif sii sir sis sit sr- src sre srf sri srr srs srt ss- ssc sse ssf ssi ssr sss sst stc ste stf sti str sts stt tcc tce tcf tci tcr tcs tct te- tec tee tef tei ter tes tet tfc tfe tff tfi tfr tfs tft tic tie tif tii tir tis tit trc tre trf tri trr trs trt tsc tse tsf tsi tsr tss tst ttc tte ttf tti ttr tts ttt