# Enter your code here. Read input from STDIN. Print output to STDOUT
list_of_squares=[[6, 1, 8, 7, 5, 3, 2, 9, 4],
        [8, 1, 6, 3, 5, 7, 4, 9, 2],
        [8, 3, 4, 1, 5, 9, 6, 7, 2],
        [6, 7, 2, 1, 5, 9, 8, 3, 4],
        [2, 7, 6, 9, 5, 1, 4, 3, 8],
        [4, 3, 8, 9, 5, 1, 2, 7, 6],
        [4, 9, 2, 3, 5, 7, 8, 1, 6],
        [2, 9, 4, 7, 5, 3, 6, 1, 8]]
l=raw_input().split()
l.extend(raw_input().split())
l.extend(raw_input().split())
l = [ int(x) for x in l ]
minsum=999999
for i in list_of_squares:
    summ=0
    for j in xrange(0,len(i)):
        summ+=abs((l[j]-i[j]))
    if summ < minsum:
        minsum=summ
print minsum