# Enter your code here. Read input from STDIN. Print output to STDOUT

arr = []
sums = []

3.times do
    gets.strip.split(' ').map(&:to_i).each{|x| arr << x}
end

# arr = arr.compact

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

for i in 0...8
    sum = 0
    for j in 0...9
        sum += (solutions[i][j] - arr[j]).abs
    end
    sums << sum
end

puts sums.min