import strscans, strutils

var (_, s, t, u) = stdin.readLine.scanTuple("$w $i $i")

case t.cmp u
of 0:
  s.delete(t, t)
of 1:
  s.delete(t, t)
  s.delete(u, u)
else:
  s.delete(u, u)
  s.delete(t, t)

echo s