-er -th c-- ccc ccd cce cch cco ccr cct cdc cdd cde cdh cdo cdr cdt ce- cec ced cee ceh ceo cer cet ch- chc chd che chh cho chr cht co- coc cod coe coh coo cor cot crc crd cre crh cro crr crt ctc ctd cte cth cto ctr ctt dcc dcd dce dco dcr dct ddc ddd dde ddh ddo ddr ddt de- dec ded dee deh deo der det dh- dhc dhd dhe dhh dho dhr dht doc dod doe doh doo dor dot drc drd dre dro drr drt dtc dtd dte dth dto dtr dtt ec- ecc ecd ece ech eco ecr ect ed- edc edd ede edh edo edr edt eec eed eee eeo eer eet ehc ehd ehe ehh eho ehr eht eo- eoc eod eoe eoh eoo eor eot erc erd ere erh ero err ert etc etd ete eth eto etr ett hcc hcd hce hch hco hcr hct hdc hdd hde hdh hdo hdr hdt he- hec hed hee heh heo her het hhc hhd hhe hhh hho hhr hht hoc hod hoe hoh hoo hor hot hr- hrc hrd hre hrh hro hrr hrt htc htd hte hth hto htr htt oc- occ ocd och oco ocr oct odc odd ode odh odo odr odt oec oed oee oeh oeo oer oet ohc ohd ohe ohh oho ohr oht oo- ooc ood ooh ooo oor oot or- orc ord ore orh oro orr ort ot- otc otd ote oth oto otr ott rcc rcd rce rch rco rcr rct rdc rdd rde rdh rdo rdr rdt re- rec red ree reh reo rer ret rh- rhc rhd rhe rhh rho rhr rht roc rod roe roh roo ror rot rrc rrd rrh rrr rrt rtc rtd rte rto rtr rtt tcc tcd tce tch tco tcr tct tdc tdd tde tdh tdo tdr tdt te- tec ted tee teh teo ter tet th- thc thd the thh tho thr tht to- toc tod toe toh too tor tot trc trd tre trh tro trr trt ttc ttd tte tth tto ttr ttt