static void Round(int r)
{
Console.WriteLine("// ##### Round({0}) #####", r);
G(r, 0, 0, 4, 8, 12);
G(r, 1, 1, 5, 9, 13);
G(r, 2, 2, 6, 10, 14);
G(r, 3, 3, 7, 11, 15);
G(r, 4, 0, 5, 10, 15);
G(r, 5, 1, 6, 11, 12);
G(r, 6, 2, 7, 8, 13);
G(r, 7, 3, 4, 9, 14);
Console.WriteLine();
}