using System;

public class Program

{

    public static void Main()

    {

        PrintValidation("{[()]}");//True

        PrintValidation("{[(])}");//False

        PrintValidation("()[]{}");//True

    }

    //Checks if the brackets are open/closed appropriately 

    //to form a valid mathematical expression

    public static void PrintValidation(string expression)

    {

        bool isValid = false;

        //IMPLEMENT

        Console.WriteLine("Expression: "+expression+" Valid: "+isValid);

        return;

    }

}