using System;

namespace D
{
    class MainClass
    {

    public static void Main()
        {
            var s1 = Console.ReadLine().Split(' ');
            int x1 = int.Parse(s1[0]);
            int y1 = int.Parse(s1[1]);
            int h1 = int.Parse(s1[2]);

            var s2 = Console.ReadLine().Split(' ');
            int x2 = int.Parse(s2[0]);
            int y2 = int.Parse(s2[1]);
            int h2 = int.Parse(s2[2]);
            int v = int.Parse(s2[3]);

            int dist = Math.Abs(x2 - x1) + Math.Abs(y2 - y1) + h2;
            if (dist / v + (dist % v == 0 ? 0 : 1) <= h1)
                Console.WriteLine("NO");
            else
                Console.WriteLine("YES");
        }
    }
}