public void testInitializeMaze()
        {
            string input = @"###########
#0.1.....2#
#.#######.#
#4.......3#
###########";
            var    sut   = new DayTwentyFour();

            var maze = sut.InitializeMaze(input);

            Assert.Equal(5, maze.Count);
            Assert.Equal(11, maze[0].Count);

            var cell = maze[3][1];

            Assert.True(cell.IsAvailable);
            Assert.Equal(4, cell.GoalNumber);
        }