def f(row):
    row = row.strip().split()
    row = map(lambda x: int(x),row )
    return row



matrix = []

row1 = raw_input()
row2 = raw_input()
row3 = raw_input()

matrix+=f(row1)
matrix+=f(row2)
matrix+=f(row3)

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



distance = [0,0,0,0,0,0,0,0]

for i in xrange(len(all_matrices)):
    for j in xrange(len(all_matrices[i])):
        distance[i] += abs(all_matrices[i][j] - matrix[j])

print min(distance)