n = int(input())
A = []
for i in range(3):
    temp = list(map(int, input().split()))
    if len(temp) == 3:
        print('"assert"')
        exit()
    a = temp[0]
    A.append(a)
B = [A[0]+A[1], A[1]+A[2], A[2]+A[0]]
B = list(set(B))
B.sort(reverse=True)
print(B[1])