c-- ccc cce ccl cct ccv ce- cec cee cel cet cev cl- clc cle cll clt clv ctc cte ctl ctt ctv cvc cve cvl cvt cvv ec- ecc ece ecl ect ecv eec eee eel eet eev elc ele ell elt elv etc ete etl ett etv evc eve evl evt evv lcc lce lcl lct lcv lec lee lel let lev llc lle lll llt llv ltc lte ltl ltt ltv lvc lve lvl lvt lvv tcc tce tcl tct tcv te- tec tee tel tet tev tlc tle tll tlt tlv ttc tte ttl ttt ttv tvc tve tvl tvt v-e vcc vce vcl vct vec vee vel vet vl- vlc vle vll vlt vlv vtc vte vtl vtt vtv vvc vvt vvv