-er -th ddd dde ddh ddl ddr ddt de- ded dee deh del der det dh- dhd dhe dhh dhl dhr dht dl- dld dle dlh dll dlr dlt drd dre drl drr drt dtd dte dth dtl dtr dtt ed- edd ede edh edl edr edt eed eee eel eer eet ehd ehe ehh ehl ehr eht eld ele elh ell elr elt erd ere erh erl err ert etd ete eth etl etr ett hdd hde hdh hdl hdr hdt he- hed hee heh hel her het hhd hhe hhh hhl hhr hht hld hle hlh hll hlr hlt hr- hrd hre hrh hrl hrr hrt htd hte hth htl htr htt ldd lde ldh ldl ldr ldt led lee leh lel ler let lhd lhh lhr lht lld lle lll llr llt lrd lrh lrr lrt ltd lte lth ltl ltr ltt rdd rde rdh rdl rdr rdt re- red ree reh rel rer ret rh- rhd rhe rhh rhl rhr rht rld rle rlh rll rlr rlt rrd rrh rrl rrr rrt rtd rte rtl rtr rtt tdd tde tdh tdl tdr tdt te- ted tee teh tel ter tet th- thd the thh thl thr tht tld tle tlh tll tlr tlt trd tre trh trl trr trt ttd tte tth ttl ttr ttt