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

# Enter your code here. Read input from STDIN. Print output to STDOUT
square = []
magicSquare0 = [[4, 9, 2], [3, 5, 7], [8, 1, 6]]
magicSquare1 = [[8, 3, 4], [1, 5, 9], [6, 7, 2]]
magicSquare2 = [[2, 7, 6], [9, 5, 1], [4, 3, 8]]
magicSquare3 = [[6, 1, 8], [7, 5, 3], [2, 9, 4]]
magicSquare4 = [[2, 9, 4], [7, 5, 3], [6, 1, 8]]
magicSquare5 = [[6, 7, 2], [1, 5, 9], [8, 3, 4]]
magicSquare6 = [[8, 1, 6], [3, 5, 7], [4, 9, 2]]
magicSquare7 = [[4, 3, 8], [9, 5, 1], [2, 7, 6]]
for _ in range(3):
    square.append(map(int, raw_input().strip().split(" ")))
cost0 = 0
cost1 = 0
cost2 = 0
cost3 = 0
cost4 = 0
cost5 = 0
cost6 = 0
cost7 = 0
for i in range(3):
    for j in range(3):
        cost0 += fabs(magicSquare0[i][j] - square[i][j])
        cost1 += fabs(magicSquare1[i][j] - square[i][j])
        cost2 += fabs(magicSquare2[i][j] - square[i][j])
        cost3 += fabs(magicSquare3[i][j] - square[i][j])
        cost4 += fabs(magicSquare4[i][j] - square[i][j])
        cost5 += fabs(magicSquare5[i][j] - square[i][j])
        cost6 += fabs(magicSquare6[i][j] - square[i][j])
        cost7 += fabs(magicSquare7[i][j] - square[i][j])
print int(min(cost0, cost1, cost2, cost3, cost4, cost5, cost6, cost7))