using System;

public class Program

{

    public static void Main()

    {

        long fib3 = 2;

        long fib6 = 0;

        long fibs = 2;

        long sum = 0;

    while (fibs < 4000000)

    {

        sum += fibs;

        fibs = 4*fib3 + fib6;

        fib6 = fib3;

        fib3 = fibs;

    }

        Console.WriteLine("Considering the terms in the Fibonacci sequence whose values do not exceed four million, the sum of the even-valued terms is "+sum);

    } 

}