trait Foo {
  def a: String
  val b = a + " "
}
class Bar extends Foo { override val a = "a" }
class Baz extends Foo { override def a = "a" }
class Bla extends Foo { override lazy val a = "a" }

// guess what the code below prints
println(new Bar().b)
println(new Baz().b)
println(new Bla().b)


trait Foo2 {
  def a: String = "b"
  val b = a + " "
}
class Bar2 extends Foo2 { override val a = "a" }
class Baz2 extends Foo2 { override def a = "a" }
class Bla2 extends Foo2 { override lazy val a = "a" }

// And for the kicker, guess what the code below prints
println(new Bar2().b)
println(new Baz2().b)
println(new Bla2().b)