using System;

public class Program

{

    public static void MyMethod(string word){

        int length = word.Length;

        if(length%2==0 && length%4==0){

            Console.WriteLine("Stack Overflow!");

        }

        else if(length%2 == 0){

            Console.WriteLine("Stack");

        }

        else if(length%4==0){

            Console.WriteLine("Overflow");

        }

        else{

            Console.WriteLine("The length of the entered word {0} is neither a multiple of 2 or 4",length);

        }

    }

    public static void Main()

    {

        MyMethod("Mpumelelo");

    }

}