public void Day25_Part1_Examples_CountSteps()
        {
            var d = new Day25();

            var expected = 12;
            var actual   = d.CountStepsToPosition(3, 3);

            Assert.AreEqual(expected, actual);

            expected = 18;
            actual   = d.CountStepsToPosition(3, 4);
            Assert.AreEqual(expected, actual);
        }