test_square = []

while 1 :
    try :
        test_square.append([int(x) for x in input().strip().split()])
    except :
        break

test_square = [x for row in test_square for x in row]        
        
magic_squares = [[2,7,6,9,5,1,4,3,8],[6,7,2,1,5,9,8,3,4],[4,3,8,9,5,1,2,7,6],[2,9,4,7,5,3,6,1,8],[8,1,6,3,5,7,4,9,2],[4,9,2,3,5,7,8,1,6],[8,3,4,1,5,9,6,7,2],[6,1,8,7,5,3,2,9,4]]

min_cost = 10**6

for square in magic_squares :
    cost = 0
    for i,element in enumerate(square) :
        cost += abs(element - test_square[i])
    if cost < min_cost :
        min_cost = cost
        
print(min_cost)