-er -ic c-- ccc cce ccg cci cco ccr ce- cec cee ceg cei ceo cer cgc cge cgg cgi cgo cgr ci- cic cie cig cii cio cir co- coc coe cog coi coo cor crc cre crg cri cro crr ec- ecc ece ecg eci eco ecr eec eee eeg eeo eer egc ege egg egi ego egr eic eie eig eii eio eir eo- eoc eoe eog eoi eoo eor erc ere erg eri ero err gcc gce gcg gci gco gcr ge- gec gee geg gei geo ger ggc ggg ggi ggo ggr gic gie gig gii gio gir goc goe gog goi goo gor grc gre grg gri gro grr icc ice icg ici ico icr ie- iec iee ieg iei ier igc ige igg igi igo igr iic iie iii iio iir io- ioc ioe iog ioi ioo ior ir- irc ire irg iri iro irr o-i oc- occ ocg oci oco ocr oec oee oeg oei oeo oer ogc oge ogg ogi ogo oic oie oii oio oir oo- ooc oog ooi ooo oor or- orc ore org ori oro orr rcc rce rcg rci rco rcr re- rec ree reg rei reo rer rgc rge rgg rgi rgo rgr ric rie rig rii rio rir roc roe rog roi roo ror rrc rrg rri rrr