-er c-- ccc cce ccl ccp ccr ccs cct ce- cec cee cel cep cer ces cet cl- clc cle cll clp clr cls clt cpc cpe cpl cpp cpr cps cpt crc cre crl crp crr crs crt csc cse csl csp csr css cst ctc cte ctl ctp ctr cts ctt ec- ecc ece ecl ecr ecs ect eec eee eel eep eer ees eet elc ele ell elp elr els elt ep- epc epe epl epp epr eps ept erc ere erl erp err ers ert es- esc ese esl esp esr ess est etc ete etl etp etr ets ett l-p lcc lce lcl lcp lcr lcs lct lec lee lel lep ler les let llc lle lll llp llr lls llt lpc lpe lpl lpp lpr lps lpt lrc lrp lrr lrs lrt lsc lse lsl lsp lsr lss lst ltc lte ltl ltp ltr lts ltt p-p pcc pce pcl pcp pcr pcs pct pec pee pel pep per pes pet plc ple pll plp plr pls plt ppc ppe ppl ppp ppr pps ppt prc pre prl prp prr prs prt ps- psc pse psl psp psr pss pst pt- ptc pte ptl ptp ptr pts ptt rcc rce rcl rcp rcr rcs rct re- rec ree rel rep rer res ret rlc rle rll rlp rlr rls rlt rpc rpe rpl rpp rpr rps rpt rrc rrl rrp rrr rrs rrt rsc rse rsl rsp rsr rss rst rtc rte rtl rtp rtr rts rtt scc sce scl scp scr scs sct se- sec see sel sep ser ses set slc sle sll slp slr sls slt spc spe spl spp spr sps spt sr- src sre srl srp srr srs srt ss- ssc sse ssl ssp ssr sss sst stc ste stl stp str sts stt tcc tce tcl tcp tcr tcs tct te- tec tee tel tep ter tes tet tlc tle tll tlp tlr tls tlt tpc tpe tpl tpp tpr tps tpt trc tre trl trp trr trs trt tsc tse tsl tsp tsr tss tst ttc tte ttl ttp ttr tts ttt