# Enter your code here. Read input from STDIN. Print output to STDOUT
row1 = map(int,raw_input().strip().split(' '))
row2 = map(int,raw_input().strip().split(' '))
row3 = map(int,raw_input().strip().split(' '))

s = [[0,0,0],
     [0,0,0],
     [0,0,0]]

s[0] = row1
s[1] = row2
s[2] = row3

list = [sum(row1),sum(row2),sum(row3)]

for i in range(3):
    list.append(s[0][i]+s[1][i]+s[2][i])

if max(list) != 15:
    print max(list)-15
if min(list) != 15:
    print 15-min(list)