-er -ic c-- ccc cce ccf cci cck ccr cct ce- cec cee cef cei cek cer cet cfc cfe cff cfi cfk cfr cft ci- cic cie cif cii cik cir cit ckc cki ckt crc cre crf cri crk crr crt ctc cte ctf cti ctk ctr ctt ec- ecc ece ecf eci eck ecr ect eec eee eef eek eer eet ef- efc efe eff efi efr eft eic eie eif eii eik eir eit ekc eke ekf eki ekr ekt erc ere erf eri erk err ert etc ete etf eti etk etr ett fcc fce fcf fci fck fcr fct fec fee fef fei fek fer fet ffc ffe fff ffi ffk ffr fft fic fie fif fii fik fir fit fkc fkf fki fkk fkt frc fre frf fri frk frr frt ftc fte ftf fti ftk ftr ftt i-f icc ice icf ici ick icr ict ie- iec iee ief iei iek ier iet ifc ife iff ifi ifr ift iic iie iif iii iir iit ikc ike ikf iki ikk ikr ikt ir- irc ire irf iri irk irr irt itc ite itf iti itk itt k-t kcc kce kci kck kcr kct ke- kec kee kef kei kek ker ket kfc kff kfi kic kie kif kii kik kir kit kkc kke kki kkk kkr kkt krc krf kri krk krr krt ktc kte ktf ktk ktr ktt rcc rce rcf rci rcr rct re- rec ree ref rei rek rer ret rfc rfe rff rfi rfk rfr rft ric rie rif rii rik rir rit rkc rke rkf rkk rkt rrc rrf rri rrk rrr rrt rtc rte rtf rti rtk rtr rtt tcc tce tcf tci tck tcr tct te- tec tee tef tei tek ter tet tfc tfe tff tfi tfk tfr tft tic tie tif tii tik tir tit tkc tke tkk tkr tkt trc tre trf tri trk trr trt ttc tte ttf tti ttk ttr ttt