class book(){
    var pages:Int=300
}
class puppy(b: book)
{
    fun removePages():Int=b.pages-Random().nextInt(0,100)
}

fun book.getWeight():Double=pages*1.5
val hamlet=book()
val puppy=puppy(hamlet)
fun book.CountPages(i:Int):Int=pages-i
println("${hamlet.CountPages(20) } \n")
println("${hamlet.getWeight()} \n")
println("${puppy.removePages()+hamlet.CountPages(20)}")

class puppy(val b: book)

b

puppy

class puppy(val b: book)

Random.nextInt(0,100)