public void Solve2()
{
var input = DataHelper.GetAllRows(21);
var solver = new Day21();
var result = solver.Solve2(input);
Output.WriteLine(result);
}
public void Part2()
{
var input = @"
mxmxvkd kfcds sqjhc nhms (contains dairy, fish)
trh fvjkl sbzzf mxmxvkd (contains dairy)
sqjhc fvjkl (contains soy)
sqjhc mxmxvkd sbzzf (contains fish)".ChopToList();
var solver = new Day21();
var result = solver.Solve2(input);
result.ShouldBe("mxmxvkd,sqjhc,fvjkl");
}