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

void main() {
  auto w = readln.chomp;
  int[char] char_count;
  foreach (c; w) {
    char_count[c]++;
  }

  if (char_count.values.all!"a % 2 == 0") {
    "Yes".writeln;
  } else {
    "No".writeln;
  }
}