-er -ic c-- ccc ccd cce ccg cci ccr cdc cdd cde cdg cdi cdr ce- cec ced cee ceg cei cer cgc cgd cge cgg cgi cgr ci- cic cid cie cig cii cir crc crd cre crg cri crr dcc dcd dce dcg dci dcr ddc ddd dde ddg ddi ddr de- dec ded dee deg dei der dgc dgd dge dgg dgi dgr di- dic did die dig dii dir drc drd dre drg dri drr ec- ecc ecd ece ecg eci ecr ed- edc edd ede edg edi edr eec eed eee eeg eer egc egd ege egg egi egr eic eid eie eig eii eir erc erd ere erg eri err g-d gcc gcd gce gcg gci gcr gdc gdd gde gdi gdr ge- gec ged gee geg gei ger ggc ggd ggg ggi ggr gic gid gie gig gii gir grc grd gre grg gri grr i-d icc icd ice icg ici icr idc idd ide idg idi idr ie- iec ied iee ieg iei ier igc igd ige igg igi igr iic iid iie iii iir ir- irc ird ire irg iri irr rcc rcd rce rcg rci rcr rdc rdd rde rdg rdi rdr re- rec red ree reg rei rer rgc rgd rge rgg rgi rgr ric rid rie rig rii rir rrc rrd rrg rri rrr