text: arr = []
  
  for _ in range(6):
      tmp = [int(x) for x in str(input()).split(" ")]
      arr.append(tmp)
  
  maximum = -9 * 7
  
  for i in range(6):
      for j in range(6):
          if j + 2 < 6 and i + 2 < 6:
              result = arr[i][j] + arr[i][j + 1] + arr[i][j + 2] + arr[i + 1][j + 1] + arr[i + 2][j] + arr[i + 2][j + 1] + arr[i + 2][j + 2]
              if result > maximum:
                  maximum = result
  
  print(maximum)
  