class BlockType:
    NONE = 0
    STONE = 1
    WOOD = 2
    GRASS = 3

class Block:
    def __init__(self, id: int, durability: int = 0, type: int = BlockType.NONE):
        self.id: int = id
        self.durability: int = durability
        self.type: int = type


class BlockAir(Block):
    def __init__(self):
        super().__init__(0)

class BlockStone(Block):
    def __init__(self):
        super().__init__(1, 20, BlockType.STONE)

class BlockDirt(Block):
    def __init__(self):
        super().__init__(2, 10, BlockType.GRASS)

class BlockGrass(Block):
    def __init__(self):
        super().__init__(3, 10, BlockType.GRASS)