3 open class A(<bold>n: Int</bold>, s: String = "???")
5 	class B1: A(<bold>1</bold>)
6 	class B2: A(<bold>1</bold>, "2")
7 	class B3: A(<bold>1</bold>, s = "2")
8 	class B4: A(n = <bold>1</bold>, s = "2")
9 	class B5: A(s = "2", n = <bold>1</bold>)
12 	A(<bold>1</bold>)
13 	A(<bold>1</bold>, "2")
14 	A(<bold>1</bold>, s = "2")
15 	A(n = <bold>1</bold>, s = "2")
16 	A(s = "2", n = <bold>1</bold>)
