#!/bin/python3

import math
import os
import random
import re
import sys

# Complete the formingMagicSquare function below.
def formingMagicSquare(s):

    s=sum(s,[])

    data = [
            [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]
        ]
 
    minimumCost=sys.maxsize

    for dat in data:
        diff=0
        for i, j in zip(s, dat):
            diff+=abs(i-j)

        minimumCost=min(minimumCost, diff)

    return(minimumCost)




    
    
if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')

    s = []

    for _ in range(3):
        s.append(list(map(int, input().rstrip().split())))

    result = formingMagicSquare(s)

    fptr.write(str(result) + '\n')

    fptr.close()
