-er c-- ccc cce ccl ccp ccr cct ce- cec cee cel cep cer cet cl- clc cle cll clp clr clt cpc cpe cpl cpp cpr cpt crc cre crl crp crr crt ctc cte ctl ctp ctr ctt ec- ecc ece ecl ecr ect eec eee eel eep eer eet elc ele ell elp elr elt ep- epc epe epl epp epr ept erc ere erl erp err ert etc ete etl etp etr ett l-p lcc lce lcl lcp lcr lct lec lee lel lep ler let llc lle lll llp llr llt lpc lpe lpl lpp lpr lpt lrc lrp lrr lrt ltc lte ltl ltp ltr ltt p-p pcc pce pcl pcp pcr pct pec pee pel pep per pet plc ple pll plp plr plt ppc ppe ppl ppp ppr ppt prc pre prl prp prr prt pt- ptc pte ptl ptp ptr ptt rcc rce rcl rcp rcr rct re- rec ree rel rep rer ret rlc rle rll rlp rlr rlt rpc rpe rpl rpp rpr rpt rrc rrl rrp rrr rrt rtc rte rtl rtp rtr rtt tcc tce tcl tcp tcr tct te- tec tee tel tep ter tet tlc tle tll tlp tlr tlt tpc tpe tpl tpp tpr tpt trc tre trl trp trr trt ttc tte ttl ttp ttr ttt