-er -th c-- ccc cce cch cco ccr cct ce- cec cee ceh ceo cer cet ch- chc che chh cho chr cht co- coc coe coh coo cor cot crc cre crh cro crr crt ctc cte cth cto ctr ctt ec- ecc ece ech eco ecr ect eec eee eeo eer eet ehc ehe ehh eho ehr eht eo- eoc eoe eoh eoo eor eot erc ere erh ero err ert etc ete eth eto etr ett hcc hce hch hco hcr hct he- hec hee heh heo her het hhc hhe hhh hho hhr hht hoc hoe hoh hoo hor hot hr- hrc hre hrh hro hrr hrt htc hte hth hto htr htt oc- occ och oco ocr oct oec oee oeh oeo oer oet ohc ohe ohh oho ohr oht oo- ooc ooh ooo oor oot or- orc ore orh oro orr ort ot- otc ote oth oto otr ott rcc rce rch rco rcr rct re- rec ree reh reo rer ret rh- rhc rhe rhh rho rhr rht roc roe roh roo ror rot rrc rrh rrr rrt rtc rte rto rtr rtt tcc tce tch tco tcr tct te- tec tee teh teo ter tet th- thc the thh tho thr tht to- toc toe toh too tor tot trc tre trh tro trr trt ttc tte tth tto ttr ttt