import std.algorithm,
       std.string,
       std.range,
       std.stdio,
       std.conv;

void main() {
  int[char] dic;

  foreach (c; readln.chomp) {
    if (c !in dic) {
      dic[c] = 1;
    } else {
      dic[c]++;
    }
  }

  writeln(dic.values.all!(n => n % 2 == 0) ? "Yes" : "No");
}