-er -ic c-- ccc cce ccf ccg cci ccr ce- cec cee cef ceg cei cer cfc cfe cff cfg cfi cfr cgc cge cgg cgi cgr ci- cic cie cif cig cii cir crc cre crf crg cri crr ec- ecc ece ecf ecg eci ecr eec eee eef eeg eer ef- efc efe eff efg efi efr egc ege egf egg egi egr eic eie eif eig eii eir erc ere erf erg eri err fcc fce fcf fcg fci fcr fec fee fef feg fei fer ffc ffe fff ffg ffi ffr fgc fge fgf fgg fgi fgr fic fie fif fig fii fir frc fre frf frg fri frr gcc gce gcf gcg gci gcr ge- gec gee gef geg gei ger gfc gfe gff gfi gfr ggc ggg ggi ggr gic gie gif gig gii gir grc gre grf grg gri grr i-f icc ice icf icg ici icr ie- iec iee ief ieg iei ier ifc ife iff ifg ifi ifr igc ige igf igg igi igr iic iie iif iii iir ir- irc ire irf irg iri irr rcc rce rcf rcg rci rcr re- rec ree ref reg rei rer rfc rfe rff rfg rfi rfr rgc rge rgf rgg rgi rgr ric rie rif rig rii rir rrc rrf rrg rri rrr