-er -ic c-- ccc cce ccf cci cco ccr ccs cct ce- cec cee cef cei ceo cer ces cet cfc cfe cff cfi cfo cfr cfs cft ci- cic cie cif cii cio cir cis cit co- coc coe cof coi coo cor cos cot crc cre crf cri cro crr crs crt csc cse csf csi cso csr css cst ctc cte ctf cti cto ctr cts ctt ec- ecc ece ecf eci eco ecr ecs ect eec eee eef eeo eer ees eet ef- efc efe eff efi efo efr efs eft eic eie eif eii eio eir eis eit eo- eoc eoe eof eoi eoo eor eos eot erc ere erf eri ero err ers ert es- esc ese esf esi eso esr ess est etc ete etf eti eto etr ets ett fcc fce fcf fci fco fcr fcs fct fec fee fef fei feo fer fes fet ffc ffe fff ffi ffo ffr ffs fft fic fie fif fii fir fis fit foc foe fof foi foo for fos fot frc fre frf fri fro frr frs frt fsc fse fsf fsi fso fsr fss fst ftc fte ftf fti fto ftr fts ftt i-f icc ice icf ici ico icr ics ict ie- iec iee ief iei ier ies iet ifc ife iff ifi ifo ifr ifs ift iic iie iif iii iio iir iis iit io- ioc ioe iof ioi ioo ior ios iot ir- irc ire irf iri iro irr irs irt is- isc ise isf isi iso isr iss ist itc ite itf iti ito its itt o-i oc- occ ocf oci oco ocr ocs oct oec oee oef oei oeo oer oes oet of- ofc ofe off ofi ofo ofr ofs oft oic oie oif oii oio oir ois oit oo- ooc oof ooi ooo oor oos oot or- orc ore orf ori oro orr ors ort os- osc ose osf osi oso osr oss ost ot- otc ote otf oti oto otr ots ott rcc rce rcf rci rco rcr rcs rct re- rec ree ref rei reo rer res ret rfc rfe rff rfi rfo rfr rfs rft ric rie rif rii rio rir ris rit roc roe rof roi roo ror ros rot rrc rrf rri rrr rrs rrt rsc rse rsf rsi rso rsr rss rst rtc rte rtf rti rto rtr rts rtt scc sce scf sci sco scr scs sct se- sec see sef sei seo ser ses set sfc sfe sff sfi sfo sfr sfs sft sic sie sif sii sio sir sis sit soc soe sof soi soo sor sos sot sr- src sre srf sri sro srr srs srt ss- ssc sse ssf ssi sso ssr sss sst stc ste stf sti sto str sts stt tcc tce tcf tci tco tcr tcs tct te- tec tee tef tei teo ter tes tet tfc tfe tff tfi tfo tfr tfs tft tic tie tif tii tio tir tis tit to- toc toe tof toi too tor tos tot trc tre trf tri tro trr trs trt tsc tse tsf tsi tso tsr tss tst ttc tte ttf tti tto ttr tts ttt