import sys

def all_equivalent(m):
    def all_reversed(m):
        yield m
        yield reversed(m)
        def hor_reversed(rows):
            return map(reversed, rows)
        yield hor_reversed(m)
        yield hor_reversed(reversed(m))
    for r in all_reversed(m):
        yield r
    for r in all_reversed([list(t) for t in zip(*m)]):
        yield r

def cost(s, m):
    ss = (si for row in s for si in row)
    ms = (mi for row in m for mi in row)
    return sum(abs(si - mi) for si, mi in zip(ss, ms))

magic = [[4, 9, 2], [3, 5, 7], [8, 1, 6]]
all_magic = all_equivalent(magic)
s = [list(map(int, line.split())) for line in sys.stdin.readlines()]
print(min(cost(s, m) for m in all_magic))