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

square=list(raw_input().strip().split(' '))
square2=list(raw_input().strip().split(' '))
square3=list(raw_input().strip().split(' '))

for char in square2:
    square.append(char)
for char in square3:
    square.append(char)
square=[int(char) for char in square]
    
#All 3x3 magic squares:
a=[8,1,6,3,5,7,4,9,2]
b=[4,3,8,9,5,1,2,7,6]
c=[2,9,4,7,5,3,6,1,8]
d=[6,7,2,1,5,9,8,3,4]
e=[6,1,8,7,5,3,2,9,4]
f=[8,3,4,1,5,9,6,7,2]
g=[4,9,2,3,5,7,8,1,6]
h=[2,7,6,9,5,1,4,3,8]

a_diff=[abs(i-j) for i,j in zip(square,a)]
b_diff=[abs(i-j) for i,j in zip(square,b)]
c_diff=[abs(i-j) for i,j in zip(square,c)]
d_diff=[abs(i-j) for i,j in zip(square,d)]
e_diff=[abs(i-j) for i,j in zip(square,e)]
f_diff=[abs(i-j) for i,j in zip(square,f)]
g_diff=[abs(i-j) for i,j in zip(square,g)]
h_diff=[abs(i-j) for i,j in zip(square,h)]

difflist=[sum(a_diff),sum(b_diff),sum(c_diff),sum(d_diff),sum(e_diff),sum(f_diff),sum(g_diff),sum(h_diff)]

print min(difflist)