import io:*

fun test(): void {
    println(9)
}

fun test2(toPrint: int): void {
    println(toPrint)
}

fun test3(): fun():void {
    return test4;
}

fun test4(): void {
    println(11)
}

fun doIt(fun: fun():void):void {
    fun()
}

fun itToBeDone():void {
    println(12)
}

fun doItParam(fun: fun(int):void, param:int):void {
    fun(param)
}

fun itToBeDoneParam(param:int):void {
    println(param)
}

fun main(): int {
    var val = test
    var val2: fun():void = test
    val()
    val2()


    var val3 = test2
    var val4: fun(int):void = test2
    val3(7)
    val4(8)

    test3()()
    doIt(itToBeDone)
    doItParam(itToBeDoneParam, 13)
    var indrdo = doItParam
    var indrdoParam = itToBeDoneParam
    indrdo(indrdoParam, 14)
    return 0
}