# Enter your code here. Read input from STDIN. Print output to STDOUT
import sys 
magic_squares = [[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]]

def ismagic(matrix, magic_squares):
    return matrix in magic_squares

def make_magic(matrix, magic_squares):
    diff = []
    for square in magic_squares:
        diff.append(sum([abs(x-y) for x, y in zip(matrix, square)]))

    closest = diff.index(min(diff))
    return sum([abs(x-y) for x, y in zip(matrix, magic_squares[closest])])
    
input = []

for line in sys.stdin:
    for s in line.split(' '):
        input.append(int(s))

matrix = input  
if ismagic(matrix, magic_squares):
    print 0
else:
    print make_magic(matrix, magic_squares)