masterlist = [[8,1,6,3,5,7,4,9,2],[4,3,8,9,5,1,2,7,6],[2,9,4,7,5,3,6,1,8],[6,7,2,1,5,9,8,3,4],[6,1,8,7,5,3,2,9,4],[8,3,4,1,5,9,6,7,2],[4,9,2,3,5,7,8,1,6],[2,7,6,9,5,1,4,3,8]]

def compareSquares(first, second):
    return sum(abs(first[x]-second[x]) for x in range(9))
    
candidate = []
for _ in range(3):
    candidate.extend([int(x) for x in input().strip().split()])

print(min(compareSquares(masterlist[y], candidate) for y in range(8)))