def findmin():
    sum = 0
    for i in range(3):
        for j in range(3):
            sum = sum + abs(s[i][j]-sq[i][j])
            #print('sum',sum)
    return sum
def trans():
    global sq
    #print(type(sq))
    #print(sq)
    for i in range(3):
        for j in range(3):
            if(i < j):
                temp = sq[i][j]
                sq[i][j] = sq[j][i]
                sq[j][i] = temp
    #print(sq)
    return
x = list()
s = list()
for i in range(3):
    t = input().split()
    s.append(t)
for i in range(3):
    for j in range(3):
        s[i][j] = int(s[i][j])
#print(s)
sq = [[2,7,6],[9,5,1],[4,3,8]]
#print(sq[2][2])
mini = 1000
for i in range(4):
    if(i == 2):
        trans()
    w = findmin()
    #print(w)
    if mini > w:
        mini = w
    for j in range(3):    
        sq[j].reverse()
    #print(sq)
    w = findmin()
    #print(w)
    if mini > w:
        mini = w
    sq.reverse()
    #print(sq)
print(mini)