-er -th c-- ccc cce cch ccp ccr cct ce- cec cee ceh cep cer cet ch- chc che chh chp chr cht cpc cpe cph cpp cpr cpt crc cre crh crp crr crt ctc cte cth ctp ctr ctt ec- ecc ece ech ecr ect eec eee eep eer eet ehc ehe ehh ehp ehr eht ep- epc epe eph epp epr ept erc ere erh erp err ert etc ete eth etp etr ett hcc hce hch hcp hcr hct he- hec hee heh hep her het hhc hhe hhh hhp hhr hht hpc hpe hph hpp hpr hpt hr- hrc hre hrh hrp hrr hrt htc hte hth htp htr htt p-p pcc pce pch pcp pcr pct pec pee peh pep per pet phc phe php phr pht ppc ppe pph ppp ppr ppt prc pre prh prp prr prt pt- ptc pte pth ptp ptr ptt rcc rce rch rcp rcr rct re- rec ree reh rep rer ret rh- rhc rhe rhh rhp rhr rht rpc rpe rph rpp rpr rpt rrc rrh rrp rrr rrt rtc rte rtp rtr rtt tcc tce tch tcp tcr tct te- tec tee teh tep ter tet th- thc the thh thp thr tht tpc tpe tph tpp tpr tpt trc tre trh trp trr trt ttc tte tth ttp ttr ttt