-er -ic c-- ccc ccd cce cci cco ccr cct cdc cdd cde cdi cdo cdr cdt ce- cec ced cee cei ceo cer cet ci- cic cid cie cii cio cir cit co- coc cod coe coi coo cor cot crc crd cre cri cro crr crt ctc ctd cte cti cto ctr ctt dcc dcd dce dci dco dcr dct ddc ddd dde ddi ddo ddr ddt de- dec ded dee dei deo der det di- dic did die dii dio dir dit doc dod doe doi doo dor dot drc drd dre dri dro drr drt dtc dtd dte dti dto dtr dtt ec- ecc ecd ece eci eco ecr ect ed- edc edd ede edi edo edr edt eec eed eee eeo eer eet eic eid eie eii eio eir eit eo- eoc eod eoe eoi eoo eor eot erc erd ere eri ero err ert etc etd ete eti eto etr ett i-d icc icd ice ici ico icr ict idc idd ide idi ido idr idt ie- iec ied iee iei ier iet iic iid iie iii iio iir iit io- ioc iod ioe ioi ioo ior iot ir- irc ird ire iri iro irr irt itc itd ite iti ito itt o-i oc- occ ocd oci oco ocr oct odc odd ode odi odo odr odt oec oed oee oei oeo oer oet oic oid oie oii oio oir oit oo- ooc ood ooi ooo oor oot or- orc ord ore ori oro orr ort ot- otc otd ote oti oto otr ott rcc rcd rce rci rco rcr rct rdc rdd rde rdi rdo rdr rdt re- rec red ree rei reo rer ret ric rid rie rii rio rir rit roc rod roe roi roo ror rot rrc rrd rri rrr rrt rtc rtd rte rti rto rtr rtt tcc tcd tce tci tco tcr tct tdc tdd tde tdi tdo tdr tdt te- tec ted tee tei teo ter tet tic tid tie tii tio tir tit to- toc tod toe toi too tor tot trc trd tre tri tro trr trt ttc ttd tte tti tto ttr ttt