c-- ccc ccd cce ccf ccl cct cdc cdd cde cdf cdl cdt ce- cec ced cee cef cel cet cfc cfd cfe cff cfl cft cl- clc cld cle clf cll clt ctc ctd cte ctf ctl ctt dcc dcd dce dcf dcl dct ddc ddd dde ddf ddl ddt de- dec ded dee def del det dfc dfd dfe dff dfl dft dl- dlc dld dle dlf dll dlt dtc dtd dte dtf dtl dtt ec- ecc ecd ece ecf ecl ect ed- edc edd ede edf edl edt eec eed eee eef eel eet ef- efc efd efe eff efl eft elc eld ele elf ell elt etc etd ete etf etl ett fcc fcd fce fcf fcl fct fdc fdd fde fdf fdl fdt fec fed fee fef fel fet ffc ffd ffe fff ffl fft flc fld fle flf fll flt ftc ftd fte ftf ftl ftt lcc lcd lce lcf lcl lct ldc ldd lde ldf ldl ldt lec led lee lef lel let lfc lfd lfe lff lfl lft llc lld lle llf lll llt ltc ltd lte ltf ltl ltt tcc tcd tce tcf tcl tct tdc tdd tde tdf tdl tdt te- tec ted tee tef tel tet tfc tfd tfe tff tfl tft tlc tld tle tlf tll tlt ttc ttd tte ttf ttl ttt