pizza_list = [int(input()) for _ in range(8)]
mushroom_count = []
for i in range(8):
total_mushroom = 0
if i + 4 < len(pizza_list):
total_mushroom = sum(pizza_list[i:i + 4])
else:
total_mushroom = sum(pizza_list[i:] + pizza_list[:i + 4 - len(pizza_list)])
mushroom_count.append(total_mushroom)
print(max(mushroom_count))