l1 = input().strip().split(' ')
l2 = input().strip().split(' ')
l3 = input().strip().split(' ')

magic={}
magic["a"]= int(l1[0])
magic["b"]= int(l1[1])
magic["c"]= int(l1[2])
magic["d"]= int(l2[0])
magic["e"]= int(l2[1])
magic["f"]= int(l2[2])
magic["g"]= int(l3[0])
magic["h"]= int(l3[1])
magic["i"]= int(l3[2])

m1=[8,1,6,3,5,7,4,9,2]
m2=[8,3,4,1,5,9,6,7,2]
m3=[6,7,2,1,5,9,8,3,4]
m4=[4,9,2,3,5,7,8,1,6]
m5=[2,9,4,7,5,3,6,1,8]
m6=[2,7,6,9,5,1,4,3,8]
m7=[4,3,8,9,5,1,2,7,6]
m8=[6,1,8,7,5,3,2,9,4]

def ScoreFunc(myList = []):
    score = abs(magic["a"]-myList[0])
    score += abs(magic["b"]-myList[1])
    score += abs(magic["c"]-myList[2])
    score += abs(magic["d"]-myList[3])
    score += abs(magic["e"]-myList[4])
    score += abs(magic["f"]-myList[5])
    score += abs(magic["g"]-myList[6])
    score += abs(magic["h"]-myList[7])
    score += abs(magic["i"]-myList[8])
    return score
        
lowestscore = ScoreFunc(m1)

if (ScoreFunc(m2)<lowestscore):
    lowestscore = ScoreFunc(m2)
if (ScoreFunc(m3)<lowestscore):
    lowestscore = ScoreFunc(m3)
if (ScoreFunc(m3)<lowestscore):
    lowestscore = ScoreFunc(m3)
if (ScoreFunc(m4)<lowestscore):
    lowestscore = ScoreFunc(m4)
if (ScoreFunc(m5)<lowestscore):
    lowestscore = ScoreFunc(m5)
if (ScoreFunc(m6)<lowestscore):
    lowestscore = ScoreFunc(m6)
if (ScoreFunc(m7)<lowestscore):
    lowestscore = ScoreFunc(m7)
if (ScoreFunc(m8)<lowestscore):
    lowestscore = ScoreFunc(m8)
    
print (lowestscore)