public static int Part2()
{
var input = Input.ReadLines(day: 17);
var cycle0 = PocketDimension4d.Parse(input);
var cycle1 = cycle0.Next();
var cycle2 = cycle1.Next();
var cycle3 = cycle2.Next();
var cycle4 = cycle3.Next();
var cycle5 = cycle4.Next();
var cycle6 = cycle5.Next();
return(cycle6.ActiveCells.Count);
}
protected override long?SolvePart2Impl(string input) => PocketDimension4d.Run(new PocketDimension4d(input), 6).ActiveCubes.Count;
