class Cell:
    MIN_NEIGHBORS = 1
    MAX_NEIGHBORS = 4

    def __init__(self) -> None:
        self.neighbors = []

    def add_neightbor(self, new_neighbor: "Cell"):
        self.neighbors.append(new_neighbor)

    def __str__(self) -> str:
        return "o"


class StatSphere(Cell):
    pass


class StrengthSphere(StatSphere):
    def __init__(self) -> None:
        super().__init__()