/*sealed*/ interface SI1 {
    class A : SI1
    class B : SI1
}

/*sealed*/ abstract class SC1 {
    class A: SC1()
    class B: SC1()
}

abstract class E1 {
    object A : E1()
    object B : E1()
}

abstract class E2 {
    class A : E2()
    class B : E2()
}

sealed interface SI2 {
    object ClassToObject : SI2
    class ObjectToClass : SI2
}

sealed class SC2 {
    object ClassToObject : SC2()
    class ObjectToClass : SC2()
}