-er -th c-- ccc cce cch cck ccr cct ce- cec cee ceh cek cer cet ch- chc che chh chk chr cht ckc ckh ckt crc cre crh crk crr crt ctc cte cth ctk ctr ctt ec- ecc ece ech eck ecr ect eec eee eek eer eet ehc ehe ehh ehr eht ekc eke ekh ekr ekt erc ere erh erk err ert etc ete eth etk etr ett hcc hce hch hck hcr hct he- hec hee heh hek her het hhc hhe hhh hhk hhr hht hkh hkk hkr hkt hr- hrc hre hrh hrk hrr hrt htc hte hth htk htr htt k-t kcc kce kch kck kcr kct ke- kec kee keh kek ker ket khe khh khk khr kkc kke kkh kkk kkr kkt krc krk krr krt ktc kte kth ktk ktr ktt rcc rce rch rcr rct re- rec ree reh rek rer ret rh- rhc rhe rhh rhr rht rkc rke rkk rkt rrc rrh rrk rrr rrt rtc rte rtk rtr rtt tcc tce tch tck tcr tct te- tec tee teh tek ter tet th- thc the thh thk thr tht tkc tke tkk tkr tkt trc tre trh trk trr trt ttc tte tth ttk ttr ttt