def reorder_decision(current_inventory: int, reorder_point: int) -> str:
    """
    Determine whether a part needs to be reordered.

    Rules
    -----
    - Above the reorder point: return 'No reorder needed'.
    - Exactly at the reorder point: return 'Prepare to reorder'.
    - Below the reorder point: return 'Reorder now'.

    Parameters
    ----------
    current_inventory : int
        The current inventory level of the part.
    reorder_point : int
        The inventory level at which reordering is required.

    Returns
    -------
    str
        'No reorder needed', 'Prepare to reorder', or 'Reorder now'.

    Examples
    --------
    >>> reorder_decision(70, 60)
    'No reorder needed'
    >>> reorder_decision(60, 60)
    'Prepare to reorder'
    >>> reorder_decision(50, 60)
    'Reorder now'
    """
    raise NotImplementedError("Replace this line with your code.")