-er -th ddd dde ddh ddo ddr ddt ddx de- ded dee deh deo der det dex dh- dhd dhe dhh dho dhr dht dod doe doh doo dor dot dox drd dre dro drr drt drx dtd dte dth dto dtr dtt dtx dxd dxo dxr dxt dxx ed- edd ede edh edo edr edt edx eed eee eeo eer eet eex ehd ehe ehh eho ehr eht eo- eod eoe eoh eoo eor eot erd ere erh ero err ert etd ete eth eto etr ett etx ex- exd exe exh exo exr ext exx hdd hde hdh hdo hdr hdt hdx he- hed hee heh heo her het hex hhd hhe hhh hho hhr hht hod hoe hoh hoo hor hot hox hr- hrd hre hrh hro hrr hrt htd hte hth hto htr htt htx hxd odd ode odh odo odr odt oed oee oeh oeo oer oet oex ohd ohe ohh oho ohr oht oo- ood ooh ooo oor oot oox or- ord ore orh oro orr ort orx ot- otd ote oth oto otr ott ox- oxo oxt oxx rdd rde rdh rdo rdr rdt rdx re- red ree reh reo rer ret rex rh- rhd rhe rhh rho rhr rht rod roe roh roo ror rot rox rrd rrh rrr rrt rtd rte rto rtr rtt rtx rxr t-x tdd tde tdh tdo tdr tdt tdx te- ted tee teh teo ter tet tex th- thd the thh tho thr tht thx to- tod toe toh too tor tot tox trd tre trh tro trr trt trx ttd tte tth tto ttr ttt ttx txe txt xde xdh xdr xdt xed xee xer xet xex xhd xht xod xoo xor xot xox xrd xrt xrx xtr xtx xxo xxx