public void Should_SolvePartTwoExample()
            {
                var walker = new KeyPadWalker(KeyPads.PartTwoKeyPad, new Position(0, 2, 0, 4), null);

                string solution = walker.WalkKeyPad(_input);

                Assert.Equal("5DB3", solution);
            }
            public void Should_SolvePartOneExample()
            {
                var walker = new KeyPadWalker(KeyPads.PartOneKeyPad, new Position(1, 1, 0, 2), null);

                string solution = walker.WalkKeyPad(_input);

                Assert.Equal("1985", solution);
            }