class S1 {
  int s1;
  int s2;
  S1(this.s1, [this.s2 = 42]);
}

class C1 extends S1 {
  int i1;
  int i2;
  C1(this.i1, super.s1, int x, [super.s2]) : this.i2 = x;
}

class S2 {
  S2(
      {String one = "1",
      bool two = false,
      int three = 3,
      double four = 4,
      num five = 3.14,
      List<String> six = const ["six"]});
}

class C21 extends S2 {
  C21(
      {dynamic foo,
      super.one,
      dynamic bar,
      dynamic baz,
      super.three,
      super.five});
}

class C22 extends S2 {
  C22(
      {dynamic foo,
      super.six,
      dynamic bar,
      dynamic baz,
      super.four,
      super.two});
}

class C23 extends S2 {
  C23(
      {super.three,
      dynamic foo,
      super.one,
      super.four,
      dynamic bar,
      super.two,
      dynamic baz});
}

main() {}