public void Test()
{
var instructions = new List <int> {
2, 8, 10, 9, 1, 3, 4, 7, 6, 5
};
var actual = Kata.Liftoff(instructions);
var expected = "10 9 8 7 6 5 4 3 2 1 liftoff!";
Assert.Equal(expected, actual);
}