c-- ccc cce ccf ccl cct ce- cec cee cef cel cet cfc cfe cff cfl cft cl- clc cle clf cll clt ctc cte ctf ctl ctt ec- ecc ece ecf ecl ect eec eee eef eel eet ef- efc efe eff efl eft elc ele elf ell elt etc ete etf etl ett fcc fce fcf fcl fct fec fee fef fel fet ffc ffe fff ffl fft flc fle flf fll flt ftc fte ftf ftl ftt lcc lce lcf lcl lct lec lee lef lel let lfc lfe lff lfl lft llc lle llf lll llt ltc lte ltf ltl ltt tcc tce tcf tcl tct te- tec tee tef tel tet tfc tfe tff tfl tft tlc tle tlf tll tlt ttc tte ttf ttl ttt