-er c-- ccc ccd cce ccl ccn ccr cdc cdd cde cdl cdn cdr ce- cec ced cee cel cen cer cl- clc cld cle cll cln clr cn- cnc cnd cne cnl cnn cnr crc crd cre crl crn crr dcc dcd dce dcl dcn dcr ddc ddd dde ddl ddn ddr de- dec ded dee del den der dl- dlc dld dle dll dlr dnc dnd dne dnl dnn dnr drc drd dre drl drn drr ec- ecc ecd ece ecl ecn ecr ed- edc edd ede edl edn edr eec eed eee eel een eer elc eld ele ell eln elr en- enc end ene enl enn enr erc erd ere erl ern err lcc lcd lce lcl lcn lcr ldc ldd lde ldl ldn ldr lec led lee lel len ler llc lld lle lll lln llr lnc lnd lne lnl lnn lnr lrc lrd lrn lrr ncc ncd nce ncl ncn ncr ndc ndd nde ndl ndn ndr ne- nec ned nee nel nen ner nlc nld nle nll nln nlr nnc nne nnl nnn nrc nrd nre nrl nrn nrr rcc rcd rce rcl rcn rcr rdc rdd rde rdl rdn rdr re- rec red ree rel ren rer rlc rld rle rll rln rlr rnc rnd rnn rnr rrc rrd rrl rrn rrr