-er c-- ccc cce ccn ccp ccr ccs cct ce- cec cee cen cep cer ces cet cn- cnc cne cnn cnp cnr cns cnt cpc cpe cpn cpp cpr cps cpt crc cre crn crp crr crs crt csc cse csn csp csr css cst ctc cte ctn ctp ctr cts ctt ec- ecc ece ecn ecr ecs ect eec eee een eep eer ees eet en- enc ene enn enp enr ens ent ep- epc epe epn epp epr eps ept erc ere ern erp err ers ert es- esc ese esn esp esr ess est etc ete etn etp etr ets ett ncc nce ncn ncp ncr ncs nct ne- nec nee nen nep ner nes net nnc nne nnn nnp nns nnt npc npe npn npp npr nps npt nrc nre nrn nrp nrr nrs nrt nsc nse nsn nsp nsr nss nst ntc nte ntn ntp ntr nts ntt p-p pcc pce pcn pcp pcr pcs pct pec pee pen pep per pes pet pn- pnc pne pnn pnp pnr pns pnt ppc ppe ppn ppp ppr pps ppt prc pre prn prp prr prs prt ps- psc pse psn psp psr pss pst pt- ptc pte ptn ptp ptr pts ptt rcc rce rcn rcp rcr rcs rct re- rec ree ren rep rer res ret rnc rnn rnp rnr rns rnt rpc rpe rpn rpp rpr rps rpt rrc rrn rrp rrr rrs rrt rsc rse rsn rsp rsr rss rst rtc rte rtn rtp rtr rts rtt scc sce scn scp scr scs sct se- sec see sen sep ser ses set snc sne snn snp snr sns snt spc spe spn spp spr sps spt sr- src sre srn srp srr srs srt ss- ssc sse ssn ssp ssr sss sst stc ste stn stp str sts stt tcc tce tcn tcp tcr tcs tct te- tec tee ten tep ter tes tet tnc tne tnn tnp tnr tns tnt tpc tpe tpn tpp tpr tps tpt trc tre trn trp trr trs trt tsc tse tsn tsp tsr tss tst ttc tte ttn ttp ttr tts ttt