object Main extends App {
      def foo[T](code: => T) : Runnable = new Runnable { def run = code }
      override def main(args: Array[String]): Unit = {
        val x: Runnable = foo(() => {
          System.out.println("b")
        })
        val y: Runnable = foo({
          System.out.println("d")
        })
        System.out.println("a")
        x.run()
        System.out.println("c")
        y.run()
        System.out.println("e")
      }
    }
 

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