file = open('14A.txt')
n = int(file.readline())
A = []
for i in range(n):
    A += [int(file.readline())]

Max = 0
for i in range(n):
    for j in range(i + 1, n):
        for k in range(j + 1, n):
            for h in range(k + 1, n):
                if (A[i] * A[j] * A[k] * A[h]) % 12 == 0:
                    Max = max(Max, A[i] + A[j] + A[k] + A[h])
print(Max)