# Enter your code here. Read input from STDIN. Print output to STDOUT# Enter your code here. Read input from STDIN. Print output to STDOUT4 9 2

r1 = map(int, raw_input().strip().split(' '))
r2 = map(int, raw_input().strip().split(' '))
r3 = map(int, raw_input().strip().split(' '))

r = r1 + r2 + r3

p1 = [2,7,6,9,5,1,4,3,8]
p2 = [4,9,2,3,5,7,8,1,6]
p3 = [6,1,8,7,5,3,2,9,4]
p4 = [8,3,4,1,5,9,6,7,2]

p5 = [2,9,4,7,5,3,6,1,8]
p6 = [4,3,8,9,5,1,2,7,6]
p7 = [6,7,2,1,5,9,8,3,4]
p8 = [8,1,6,3,5,7,4,9,2]

p = [p1, p2, p3, p4, p5, p6, p7, p8]

min_cost = 45
for index, pat in enumerate(p):
    cost = 0
    for index, val in enumerate(pat):
        if val != r[index]:
            cost += abs(val - r[index])
    
    min_cost = cost if min_cost > cost else min_cost
    
print min_cost