# Enter your code here. Read input from STDIN. Print output to STDOUT
a1 = [[8,1,6],[3,5,7],[4,9,2]]
a2 = [[6,1,8],[7,5,3],[2,9,4]]
a3 = [[4,3,8],[9,5,1],[2,7,6]]
a4 = [[2,7,6],[9,5,1],[4,3,8]]
a5 = [[2,9,4],[7,5,3],[6,1,8]]
a6 = [[4,9,2],[3,5,7],[8,1,6]]
a7 = [[6,7,2],[1,5,9],[8,3,4]]
a8 = [[8,3,4],[1,5,9],[6,7,2]]
a = []
su = []

a.append(map(int,raw_input().split()))
a.append(map(int,raw_input().split()))
a.append(map(int,raw_input().split()))
t = 0
for x in range(3):
    for y in range(3):
        t = t + abs(a[x][y]-a1[x][y])
su.append(t)
t = 0
for x in range(3):
    for y in range(3):
        t += abs(a[x][y]-a2[x][y])
su.append(t)
t = 0
for x in range(3):
    for y in range(3):
        t += abs(a[x][y]-a3[x][y])
su.append(t)
t = 0
for x in range(3):
    for y in range(3):
        t += abs(a[x][y]-a4[x][y])
su.append(t)
t = 0
for x in range(3):
    for y in range(3):
        t += abs(a[x][y]-a5[x][y])
su.append(t)
t = 0
for x in range(3):
    for y in range(3):
        t += abs(a[x][y]-a6[x][y])
su.append(t)
t = 0
for x in range(3):
    for y in range(3):
        t += abs(a[x][y]-a7[x][y])
su.append(t)
t = 0
for x in range(3):
    for y in range(3):
        t += abs(a[x][y]-a8[x][y])
su.append(t)
print min(su)