abstract class Key {
  Key(int x, int y)
      : foo = x ^ y,
        bar = x ^ y {}
  Key.NotDuplicate(int x, int y)
      : foo = x ^ y,
        bar = x ^ y {}
  int bar;
  int foo;
  int get a => runtimeType.hashCode ^ null.hashCode;
  int get b => runtimeType.hashCode ^ null.hashCode;
  int get c {}
  int get d {}
  int get e => 1 + runtimeType.hashCode ^ null.hashCode + 3;
  int get f => 1 + runtimeType.hashCode ^ null.hashCode + 3;
  int get g {}
  int get h {}
  int i(int x, int y) => x ^ y;
  int j(int x, int y) => x ^ y;
  int k(int x, int y) {}
  int l(int x, int y) {}
  int m(int x, int y) {}
  int n(int x, int y) {}
  int o(int x, int y) => 1 + x ^ y + 3;
  int p(int x, int y) => 1 + x ^ y + 3;
  int q(int x, int y) {}
  int r(int x, int y) {}
  s(int x, int y) {}
}

main() {}