# Enter your code here. Read input from STDIN. Print output to STDOUT
a=map(int,raw_input().strip().split(" "))
M=[a]
for j in range(1,3):
    a=map(int,raw_input().strip().split(" "))
    M.append(a)
    
#Now M is a 3x3 matrix
magicm={} #magicm is a dictionary
magicm[1]=[[4,9,2],[3,5,7],[8,1,6]]
magicm[2]=[[8,3,4],[1,5,9],[6,7,2]]
magicm[3]=[[6,1,8],[7,5,3],[2,9,4]]
magicm[4]=[[2,7,6],[9,5,1],[4,3,8]]
magicm[5]=zip(*magicm[1])
magicm[6]=zip(*magicm[2])
magicm[7]=zip(*magicm[3])
magicm[8]=zip(*magicm[4])

def subtractM(m,M):
    return map(lambda i: map(lambda x,y: x-y, m[i],M[i]),xrange(len(m)))
    

totdiff=[]
for k in range(1,9):
    m=magicm[k]
    difm=subtractM(m,M)
    absdiff=map(lambda i: map(lambda x: abs(x),difm[i]),xrange(len(difm)))
    sumd=sum(absdiff[0])+sum(absdiff[1])+sum(absdiff[2])
    totdiff.append(sumd)
    
print min(totdiff)