ERR:
test.kt:4:13: error: classifier 'class System : Any' does not have a companion object, so it cannot be used as an expression.
    val s = System.in
            ^^^^^^
test.kt:4:13: error: syntax error: Qualified expression without selector.
    val s = System.in
            ^^^^^^^^^
test.kt:4:20: error: syntax error: Expecting an element.
    val s = System.in
                   ^^

Return code: 1