# Enter your code here. Read input from STDIN. Print output to STDOUT
def pm(arr):
    for i in arr:
        print i
def rotate(mat):
    ret=[]
    for i in range(len(mat)):
        temp=[mat[len(mat)-1][i],mat[len(mat)-2][i],mat[len(mat)-3][i]]
        ret.append(temp)
    return ret
def col_swap(mat):
    ret=[]
    for i in range(len(mat)):
        temp=[mat[i][2],mat[i][1],mat[i][0]]
        ret.append(temp)
    return ret
def row_swap(mat):  
    return [mat[2],mat[1],mat[0]]
def calc_cost(source,m):
    s=0
    for i in range(3):
        for j in range(3):
            s+=abs(source[i][j]-m[i][j])
    return s
m=[]
cost=0
for i in range(3):
    m.append([])
    m[i]=map(int,raw_input().strip().split(' '))
base=[[2, 7, 6],
[9, 5, 1],
[4, 3, 8]]
arr=[]
arr.append(base)
r=rotate(base)
arr.append(r)
temp=col_swap(base)
arr.append(temp)
arr.append(row_swap(temp))
arr.append(row_swap(base))
arr.append(row_swap(r))
arr.append(col_swap(r))
arr.append(row_swap(col_swap(r)))
cost=15*9
for i in arr:
    cost=min(calc_cost(i,m),cost)
print cost