eeee eees eers eery eese eesy er-x erer eres erre errs erse erye eryx esee eser eses esse essy exer exes exrx exxy eyer eyes eyey eyre eyry eyse eyyr rees rere rers rery rese ress rexx reye reys rrrr rsee rsre rxes ryes rysy se-e se-s se-x se-y seer sees seex seey sere serr sers sery sese sess sex- sexe sexy seye seys sres ssee sses ssex ssrs ssss syer syes syre syrs syry syse syss syxe xeer xer- xers xexe xxxx xxxy xyr- yeer yees yere yerr yers yery yess yeye yeyr ysee yser yses ysse yyyy