-er -ic c-- ccc cce ccg cci cco ccr cct ce- cec cee ceg cei ceo cer cet cgc cge cgg cgi cgo cgr cgt ci- cic cie cig cii cio cir cit co- coc coe cog coi coo cor cot crc cre crg cri cro crr crt ctc cte ctg cti cto ctr ctt ec- ecc ece ecg eci eco ecr ect eec eee eeg eeo eer eet egc ege egg egi ego egr egt eic eie eig eii eio eir eit eo- eoc eoe eog eoi eoo eor eot erc ere erg eri ero err ert etc ete etg eti eto etr ett gcc gce gcg gci gco gcr gct ge- gec gee geg gei geo ger get ggc ggg ggi ggo ggr ggt gic gie gig gii gio gir git goc goe gog goi goo gor got grc gre grg gri gro grr grt gtc gte gtg gti gto gtr gtt icc ice icg ici ico icr ict ie- iec iee ieg iei ier iet igc ige igg igi igo igr igt iic iie iii iio iir iit io- ioc ioe iog ioi ioo ior iot ir- irc ire irg iri iro irr irt itc ite itg iti ito itt o-i oc- occ ocg oci oco ocr oct oec oee oeg oei oeo oer oet ogc oge ogg ogi ogo ogt oic oie oii oio oir oit oo- ooc oog ooi ooo oor oot or- orc ore org ori oro orr ort ot- otc ote otg oti oto otr ott rcc rce rcg rci rco rcr rct re- rec ree reg rei reo rer ret rgc rge rgg rgi rgo rgr rgt ric rie rig rii rio rir rit roc roe rog roi roo ror rot rrc rrg rri rrr rrt rtc rte rtg rti rto rtr rtt tcc tce tcg tci tco tcr tct te- tec tee teg tei teo ter tet tgc tge tgg tgi tgo tgr tgt tic tie tig tii tio tir tit to- toc toe tog toi too tor tot trc tre trg tri tro trr trt ttc tte ttg tti tto ttr ttt