def total(i,j,m):
a = m[i-1][j-1] + m[i-1][j] + m[i-1][j+1] 
b = m[i][j]
c = m[i+1][j-1] + m[i+1][j] + m[i+1][j+1] 
return a + b + c 


if __name__ == '__main__':
l = []
for _ in range(6):
row = list(map(int,input().split()))
l.append(row)
s = [] 
for i in range(1,5):
for j in range(1,5):
s.append(total(i,j,l)) 

print(max(s))