-er ddd dde ddl ddr ddt de- ded dee del der det dl- dld dle dll dlr dlt drd dre drl drr drt dtd dte dtl dtr dtt ed- edd ede edl edr edt eed eee eel eer eet eld ele ell elr elt erd ere erl err ert etd ete etl etr ett ldd lde ldl ldr ldt led lee lel ler let lld lle lll llr llt lrd lrr lrt ltd lte ltl ltr ltt rdd rde rdl rdr rdt re- red ree rel rer ret rld rle rll rlr rlt rrd rrl rrr rrt rtd rte rtl rtr rtt tdd tde tdl tdr tdt te- ted tee tel ter tet tld tle tll tlr tlt trd tre trl trr trt ttd tte ttl ttr ttt