-er -th c-- ccc cce cch ccm ccr cct ccx ce- cec cee ceh cem cer cet cex ch- chc che chh chm chr cht chx cmc cme cmh cmm cmr cmt cmx crc cre crh crm crr crt crx ctc cte cth ctm ctr ctt ctx cxc cxh cxr cxt cxx ec- ecc ece ech ecm ecr ect ecx eec eee eem eer eet eex ehc ehe ehh ehm ehr eht em- emc eme emh emm emr emt emx erc ere erh erm err ert etc ete eth etm etr ett etx ex- exc exe exh exr ext exx hcc hce hch hcm hcr hct he- hec hee heh hem her het hex hhc hhe hhh hhm hhr hht hmc hme hmh hmm hmr hmt hmx hr- hrc hre hrh hrm hrr hrt htc hte hth htm htr htt htx hxc hxm m-r mc- mcc mce mch mcm mcr mct mcx mec mee meh mem mer met mex mhc mhh mhm mhr mht mhx mmc mme mmh mmm mmr mmt mmx mrc mre mrh mrm mrr mrt mrx mtc mte mth mtm mtr mtt mtx mxc mxr rcc rce rch rcm rcr rct rcx re- rec ree reh rem rer ret rex rh- rhc rhe rhh rhm rhr rht rmc rme rmh rmm rmr rmt rmx rrc rrh rrm rrr rrt rtc rte rtm rtr rtt rtx rxr t-x tcc tce tch tcm tcr tct tcx te- tec tee teh tem ter tet tex th- thc the thh thm thr tht thx tmc tme tmh tmm tmr tmt tmx trc tre trh trm trr trt trx ttc tte tth ttm ttr ttt ttx txe txt xch xcr xcx xee xem xer xet xex xht xmc xmh xmm xmr xmt xmx xrc xrt xrx xtc xtm xtr xtx xxx