# Enter your code here. Read input from STDIN. Print output to STDOUT
a,b,c = map(int,raw_input().split())
e,f,g = map(int,raw_input().split())
h,i,j = map(int,raw_input().split())


s1 = [8,1,6,3,5,7,4,9,2]
s2 = [6,1,8,7,5,3,2,9,4]
s3 = [4,9,2,3,5,7,8,1,6]
s4 = [2,9,4,7,5,3,6,1,8]
s5 = [4,3,8,9,5,1,2,7,6]
s6 = [2,7,6,9,5,1,4,3,8]
s7 = [8,3,4,1,5,9,6,7,2]
s8 = [6,7,2,1,5,9,8,3,4]

s_matrix = [a,b,c,e,f,g,h,i,j]
s_target = [s1,s2,s3,s4,s5,s6,s7,s8]
ret = 100
for s in s_target:
    val = sum(map(lambda x,y: abs(x-y),s,s_matrix))
    if ret > val:
        ret = val

#ret = abs(f -5)
#ret += abs(a + b + c - 15)
#ret += abs(e+g - 10)
#ret += abs(h + i +j -15)

print ret

#missing_values = list(set([1,2,3,4,5,6,7,8,9]) -set([a,b,c,e,f,g,h,i,j]))
#ret += sum(map(lambda x:abs(x-5) if 10-x in missing_values else 0,missing_values))    
    

#print ret