-er -ic c-- ccc ccd cce ccf cci cco ccr cdc cdd cde cdf cdi cdo cdr ce- cec ced cee cef cei ceo cer cfc cfd cfe cff cfi cfo cfr ci- cic cid cie cif cii cio cir co- coc cod coe cof coi coo cor crc crd cre crf cri cro crr dcc dcd dce dcf dci dco dcr ddc ddd dde ddf ddi ddo ddr de- dec ded dee def dei deo der dfc dfd dfe dff dfi dfo dfr di- dic did die dif dii dio dir doc dod doe dof doi doo dor drc drd dre dri dro drr ec- ecc ecd ece ecf eci eco ecr ed- edc edd ede edf edi edo edr eec eed eee eef eeo eer ef- efc efd efe eff efi efo efr eic eid eie eif eii eio eir eo- eoc eod eoe eof eoi eoo eor erc erd ere erf eri ero err fcc fcd fce fcf fci fco fcr fdc fdd fde fdf fdi fdo fdr fec fed fee fef fei feo fer ffc ffd ffe fff ffi ffo ffr fic fid fie fif fii fir foc foe fof foi foo for frc frd fre frf fri fro frr i-d i-f icc icd ice icf ici ico icr idc idd ide idf idi ido idr ie- iec ied iee ief iei ier ifc ifd ife iff ifi ifo ifr iic iid iie iif iii iio iir io- ioc iod ioe iof ioi ioo ior ir- irc ird ire irf iri iro irr o-i oc- occ ocd ocf oci oco ocr odc odd ode odf odi odo odr oec oed oee oef oei oeo oer of- ofc ofd ofe off ofi ofo ofr oic oid oie oif oii oio oir oo- ooc ood oof ooi ooo oor or- orc ord ore orf ori oro orr rcc rcd rce rcf rci rco rcr rdc rdd rde rdf rdi rdo rdr re- rec red ree ref rei reo rer rfc rfd rfe rff rfi rfo rfr ric rid rie rif rii rio rir roc rod roe rof roi roo ror rrc rrd rrf rri rrr