# Enter your code here. Read input from STDIN. Print output to STDOUT
a=[2,7,6,9,5,1,4,3,8]
b=[4,9,2,3,5,7,8,1,6]
c=[8,3,4,1,5,9,6,7,2]
d=[6,1,8,7,5,3,2,9,4]
e=[2,9,4,7,5,3,6,1,8]
f=[4,3,8,9,5,1,2,7,6]
g=[8,1,6,3,5,7,4,9,2]
h=[6,7,2,1,5,9,8,3,4]
a1=0
b1=0
c1=0
d1=0
e1=0
f1=0
g1=0
h1=0
mylist=[]
ans=[]
for i in range(3):
    ar=map(int, raw_input().strip().split(' '))
    for i in range(3):
        mylist.append(ar[i])
for i in range(9):
    a1 +=abs(mylist[i]-a[i])
ans.append(a1)
for i in range(9):
    b1 +=abs(mylist[i]-b[i])
ans.append(b1)
for i in range(9):
    c1 +=abs(mylist[i]-c[i])
ans.append(c1)
for i in range(9):
    d1 +=abs(mylist[i]-d[i])
ans.append(d1)
for i in range(9):
    e1 +=abs(mylist[i]-e[i])
ans.append(e1)
for i in range(9):
    f1 +=abs(mylist[i]-f[i])
ans.append(f1)
for i in range(9):
    g1 +=abs(mylist[i]-g[i])
ans.append(g1)
for i in range(9):
    h1 +=abs(mylist[i]-h[i])
ans.append(h1)
print min(ans)