6 class B2: A(1, <bold>"2"</bold>)
3 	open class A(n: Int, <bold>s: String = "???"</bold>)
6 		class B2: A(1, <bold>"2"</bold>)

3 open class A(n: Int, s: String = <bold>"???"</bold>)
3 	open class A(n: Int, <bold>s: String = "???"</bold>)
3 		open class A(n: Int, s: String = <bold>"???"</bold>)

