// Enter your code here

import Foundation

func magicCamperer (inout notMagicArr: [[Int]],inout magicArr: [[Int]]) -> Int {
    
    
    var curCost: Int = 0
    
    for i in 0 ..< 3 {
        
        for j in 0 ..< 3 {
            
            curCost += abs(notMagicArr[i][j] - magicArr[i][j])
        }
    }
    
    return curCost
}



var notMagic: [[Int]] = []


/*Reads in matrix*/
var strInput: String = readLine()!

//Converts second line values to integers
var firstRow: [Int] = strInput.componentsSeparatedByString(" ").map(
    {
        Int($0) ?? 0
})


strInput = readLine()!

var secondRow: [Int] = strInput.componentsSeparatedByString(" ").map(
    {
        Int($0) ?? 0
})


strInput = readLine()!

var thirdRow :[Int] = strInput.componentsSeparatedByString(" ").map(
    {
        Int($0) ?? 0
})

//Adds values to 2D Matrix

notMagic.append(firstRow)
notMagic.append(secondRow)
notMagic.append(thirdRow)

//According to how magic squares are formed, a 3 X 3 magic square can only have 8 possible configurations under the given limitations

/*
 
 I:
 
 8 1 6
 3 5 7
 4 9 2
 

 II:
 
 4 3 8
 9 5 1
 2 7 6
 
 III:
 
 2 9 4
 7 5 3
 6 1 8
 
 IV:
 
 6 7 2
 1 5 9
 8 3 4
 
 V:
 
 6 1 8
 7 5 3
 2 9 4
 
 VI:
 
 8 3 4
 1 5 9
 6 7 2

 VII:
 
 4 9 2
 3 5 7
 8 1 6
 
 VIII:
 
 2 7 6
 9 5 1
 4 3 8
 
 */

//Create Magic Squares


var sq1 = [[8, 1, 6], [3, 5, 7], [4, 9, 2]]
var sq2 = [[4, 3, 8], [9, 5, 1], [2, 7, 6]]
var sq3 = [[2, 9, 4], [7, 5, 3], [6, 1, 8]]
var sq4 = [[6, 7, 2], [1, 5, 9], [8, 3, 4]]
var sq5 = [[6, 1, 8], [7, 5, 3], [2, 9, 4]]
var sq6 = [[8, 3, 4], [1, 5, 9], [6, 7, 2]]
var sq7 = [[4, 9, 2], [3, 5, 7], [8, 1, 6]]
var sq8 = [[2, 7, 6], [9, 5, 1], [4, 3, 8]]


var lowestCost: Int = 100

//Loops through all squares

var tempCost: Int = lowestCost

//Comparisons

tempCost = magicCamperer(&notMagic, magicArr: &sq1)

if tempCost < lowestCost {lowestCost = tempCost}

//

tempCost = magicCamperer(&notMagic, magicArr: &sq2)

if tempCost < lowestCost {lowestCost = tempCost}

//

tempCost = magicCamperer(&notMagic, magicArr: &sq3)

if tempCost < lowestCost {lowestCost = tempCost}

//

tempCost = magicCamperer(&notMagic, magicArr: &sq3)

if tempCost < lowestCost {lowestCost = tempCost}

//

tempCost = magicCamperer(&notMagic, magicArr: &sq4)

if tempCost < lowestCost {lowestCost = tempCost}

//

tempCost = magicCamperer(&notMagic, magicArr: &sq5)

if tempCost < lowestCost {lowestCost = tempCost}

//

tempCost = magicCamperer(&notMagic, magicArr: &sq6)

if tempCost < lowestCost {lowestCost = tempCost}

//

tempCost = magicCamperer(&notMagic, magicArr: &sq7)

if tempCost < lowestCost {lowestCost = tempCost}

//

tempCost = magicCamperer(&notMagic, magicArr: &sq8)

if tempCost < lowestCost {lowestCost = tempCost}

print(lowestCost)