def magic_squares_for_3
  [
    [
      [8, 1, 6],
      [3, 5, 7],
      [4, 9, 2],
    ],
    [
      [6, 1, 8],
      [7, 5, 3],
      [2, 9, 4],
    ],
    [
      [8, 3, 4],
      [1, 5, 9],
      [6, 7, 2],
    ],
    [
      [6, 7, 2],
      [1, 5, 9],
      [8, 3, 4],
    ],
    [
      [4, 9, 2],
      [3, 5, 7],
      [8, 1, 6],
    ],
    [
      [2, 9, 4],
      [7, 5, 3],
      [6, 1, 8]
    ],
    [
      [4, 3, 8],
      [9, 5, 1],
      [2, 7, 6],
    ],
    [
      [2, 7, 6],
      [9, 5, 1],
      [4, 3, 8],
    ],
  ]
end

def magic_square(matrix)
  magic_squares_for_3.map do |m|
    (0..2).flat_map do |i|
      (0..2).map do |j|
        (matrix[i][j] - m[i][j]).abs
      end
    end.inject(&:+)
  end.min
end

matrix = 3.times.map do
  gets.strip.split(' ').map(&:to_i)
end

p magic_square(matrix)