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

def cost(sq1, sq2)
    res = 0
    sq1.each_with_index do |row, i|
        row.each_with_index do |val, j|
            res += (val - sq2[i][j]).abs
        end
    end
    res
end

input = Array.new()
input[0] = gets.strip.split(' ').map(&:to_i)
input[1] = gets.strip.split(' ').map(&:to_i)
input[2] = gets.strip.split(' ').map(&:to_i)

costs = magic.map {|v| cost(input, v) }
puts costs.min