-er -ic c-- ccc ccd cce cci ccr cct cdc cdd cde cdi cdr cdt ce- cec ced cee cei cer cet ci- cic cid cie cii cir cit crc crd cre cri crr crt ctc ctd cte cti ctr ctt dcc dcd dce dci dcr dct ddc ddd dde ddi ddr ddt de- dec ded dee dei der det di- dic did die dii dir dit drc drd dre dri drr drt dtc dtd dte dti dtr dtt ec- ecc ecd ece eci ecr ect ed- edc edd ede edi edr edt eec eed eee eer eet eic eid eie eii eir eit erc erd ere eri err ert etc etd ete eti etr ett i-d icc icd ice ici icr ict idc idd ide idi idr idt ie- iec ied iee iei ier iet iic iid iie iii iir iit ir- irc ird ire iri irr irt itc itd ite iti itt rcc rcd rce rci rcr rct rdc rdd rde rdi rdr rdt re- rec red ree rei rer ret ric rid rie rii rir rit rrc rrd rri rrr rrt rtc rtd rte rti rtr rtt tcc tcd tce tci tcr tct tdc tdd tde tdi tdr tdt te- tec ted tee tei ter tet tic tid tie tii tir tit trc trd tre tri trr trt ttc ttd tte tti ttr ttt