-er -th c-- ccc cce cch ccl ccr cct ce- cec cee ceh cel cer cet ch- chc che chh chl chr cht cl- clc cle clh cll clr clt crc cre crh crl crr crt ctc cte cth ctl ctr ctt ec- ecc ece ech ecl ecr ect eec eee eel eer eet ehc ehe ehh ehl ehr eht elc ele elh ell elr elt erc ere erh erl err ert etc ete eth etl etr ett hcc hce hch hcl hcr hct he- hec hee heh hel her het hhc hhe hhh hhl hhr hht hlc hle hlh hll hlr hlt hr- hrc hre hrh hrl hrr hrt htc hte hth htl htr htt lcc lce lch lcl lcr lct lec lee leh lel ler let lhc lhh lhr lht llc lle lll llr llt lrc lrh lrr lrt ltc lte lth ltl ltr ltt rcc rce rch rcl rcr rct re- rec ree reh rel rer ret rh- rhc rhe rhh rhl rhr rht rlc rle rlh rll rlr rlt rrc rrh rrl rrr rrt rtc rte rtl rtr rtt tcc tce tch tcl tcr tct te- tec tee teh tel ter tet th- thc the thh thl thr tht tlc tle tlh tll tlr tlt trc tre trh trl trr trt ttc tte tth ttl ttr ttt