public void Part1_TestOne()
{
var lines = new List <string>
{
"Step C must be finished before step A can begin.",
"Step C must be finished before step F can begin.",
"Step A must be finished before step B can begin.",
"Step A must be finished before step D can begin.",
"Step B must be finished before step E can begin.",
"Step D must be finished before step E can begin.",
"Step F must be finished before step E can begin."
};
Assert.AreEqual("CABDFE", Day07.GetCorrectOrder(lines));
}