-er c-- ccc cce ccl ccr cct ce- cec cee cel cer cet cl- clc cle cll clr clt crc cre crl crr crt ctc cte ctl ctr ctt ec- ecc ece ecl ecr ect eec eee eel eer eet elc ele ell elr elt erc ere erl err ert etc ete etl etr ett lcc lce lcl lcr lct lec lee lel ler let llc lle lll llr llt lrc lrr lrt ltc lte ltl ltr ltt rcc rce rcl rcr rct re- rec ree rel rer ret rlc rle rll rlr rlt rrc rrl rrr rrt rtc rte rtl rtr rtt tcc tce tcl tcr tct te- tec tee tel ter tet tlc tle tll tlr tlt trc tre trl trr trt ttc tte ttl ttr ttt