-er c-- ccc ccd cce ccf ccl ccr cct cdc cdd cde cdf cdl cdr cdt ce- cec ced cee cef cel cer cet cfc cfd cfe cff cfl cfr cft cl- clc cld cle clf cll clr clt crc crd cre crf crl crr crt ctc ctd cte ctf ctl ctr ctt dcc dcd dce dcf dcl dcr dct ddc ddd dde ddf ddl ddr ddt de- dec ded dee def del der det dfc dfd dfe dff dfl dfr dft dl- dlc dld dle dlf dll dlr dlt drc drd dre drl drr drt dtc dtd dte dtf dtl dtr dtt ec- ecc ecd ece ecf ecl ecr ect ed- edc edd ede edf edl edr edt eec eed eee eef eel eer eet ef- efc efd efe eff efl efr eft elc eld ele elf ell elr elt erc erd ere erf erl err ert etc etd ete etf etl etr ett fcc fcd fce fcf fcl fcr fct fdc fdd fde fdf fdl fdr fdt fec fed fee fef fel fer fet ffc ffd ffe fff ffl ffr fft flc fld fle flf fll flr flt frc frd fre frf frl frr frt ftc ftd fte ftf ftl ftr ftt lcc lcd lce lcf lcl lcr lct ldc ldd lde ldf ldl ldr ldt lec led lee lef lel ler let lfc lfd lfe lff lfl lfr lft llc lld lle llf lll llr llt lrc lrd lrf lrr lrt ltc ltd lte ltf ltl ltr ltt rcc rcd rce rcf rcl rcr rct rdc rdd rde rdf rdl rdr rdt re- rec red ree ref rel rer ret rfc rfd rfe rff rfl rfr rft rlc rld rle rlf rll rlr rlt rrc rrd rrf rrl rrr rrt rtc rtd rte rtf rtl rtr rtt tcc tcd tce tcf tcl tcr tct tdc tdd tde tdf tdl tdr tdt te- tec ted tee tef tel ter tet tfc tfd tfe tff tfl tfr tft tlc tld tle tlf tll tlr tlt trc trd tre trf trl trr trt ttc ttd tte ttf ttl ttr ttt