input_square = [[int(value) for value in input().strip().split()]
                for i in range(3)]

magic_squares = [
    [[8, 1, 6],
     [3, 5, 7],
     [4, 9, 2]],
    [[6, 1, 8],
     [7, 5, 3],
     [2, 9, 4]],
    [[4, 9, 2],
     [3, 5, 7],
     [8, 1, 6]],
    [[2, 9, 4],
     [7, 5, 3],
     [6, 1, 8]],
    [[8, 3, 4],
     [1, 5, 9],
     [6, 7, 2]],
    [[4, 3, 8],
     [9, 5, 1],
     [2, 7, 6]],
    [[6, 7, 2],
     [1, 5, 9],
     [8, 3, 4]],
    [[2, 7, 6],
     [9, 5, 1],
     [4, 3, 8]]
]

def cost(initial_square, other_square):
    """
    Calculate the cost to move from
    ``initial_square`` to ``other_square``
    by changing digits a to b where the
    cost of the operation is |a - b|
    
    Args:
        initial_square (list): a 2 dimensional list
        other_square (list): a 2 dimensional list of same
            dimensions as ``initial_square``
    """
    cost = 0
    for initial_column, other_column in zip(initial_square, other_square):
        for initial_value, other_value in zip(initial_column, other_column):
            cost += abs(initial_value - other_value)
    return cost

def lowest_cost(square, other_squares):
    """
    Find the lowest cost to move from ``square``
    to any of ``other_squares`` by changing digits
    a to b where the cost of the operation
    is |a - b|
    
    Args:
        initial_square (list): a 2 dimensional list
        other_squares (list): a list of 2 dimensional lists,
            each with the same dimensions as ``initial_square``
    """
    return min((cost(square, other) for other in other_squares))

print(lowest_cost(input_square, magic_squares))