import std.algorithm, std.container, std.conv, std.math, std.range, std.typecons, std.stdio, std.string;

auto rdsp(){return readln.splitter;}
void pick(R,T)(ref R r,ref T t){t=r.front.to!T;r.popFront;}
void readV(T...)(ref T t){auto r=rdsp;foreach(ref v;t)pick(r,v);}

void main()
{
  string w; readV(w);

  auto c = new int[](26);
  foreach (wi; w) ++c[wi-'a'];

  writeln(c.all!(ci => ci%2 == 0) ? "Yes" : "No");
}
