-er -ic c-- ccc cce ccf cci cco ccr cct ce- cec cee cef cei ceo cer cet cfc cfe cff cfi cfo cfr cft ci- cic cie cif cii cio cir cit co- coc coe cof coi coo cor cot crc cre crf cri cro crr crt ctc cte ctf cti cto ctr ctt ec- ecc ece ecf eci eco ecr ect eec eee eef eeo eer eet ef- efc efe eff efi efo efr eft eic eie eif eii eio eir eit eo- eoc eoe eof eoi eoo eor eot erc ere erf eri ero err ert etc ete etf eti eto etr ett fcc fce fcf fci fco fcr fct fec fee fef fei feo fer fet ffc ffe fff ffi ffo ffr fft fic fie fif fii fir fit foc foe fof foi foo for fot frc fre frf fri fro frr frt ftc fte ftf fti fto ftr ftt i-f icc ice icf ici ico icr ict ie- iec iee ief iei ier iet ifc ife iff ifi ifo ifr ift iic iie iif iii iio iir iit io- ioc ioe iof ioi ioo ior iot ir- irc ire irf iri iro irr irt itc ite itf iti ito itt o-i oc- occ ocf oci oco ocr oct oec oee oef oei oeo oer oet of- ofc ofe off ofi ofo ofr oft oic oie oif oii oio oir oit oo- ooc oof ooi ooo oor oot or- orc ore orf ori oro orr ort ot- otc ote otf oti oto otr ott rcc rce rcf rci rco rcr rct re- rec ree ref rei reo rer ret rfc rfe rff rfi rfo rfr rft ric rie rif rii rio rir rit roc roe rof roi roo ror rot rrc rrf rri rrr rrt rtc rte rtf rti rto rtr rtt tcc tce tcf tci tco tcr tct te- tec tee tef tei teo ter tet tfc tfe tff tfi tfo tfr tft tic tie tif tii tio tir tit to- toc toe tof toi too tor tot trc tre trf tri tro trr trt ttc tte ttf tti tto ttr ttt