public void Distance_Example1()
{
var path1 = Path.Parse("R8,U5,L5,D3");
var path2 = Path.Parse("U7,R6,D4,L4");
var points = Walk.Cross(path1, path2);
Assert.Equal(2, points.Count());
Assert.Contains((3, 3), points);
Assert.Contains((6, 5), points);
}
