def F(x, A):
    return (x & A != 0) or ((x & 52 == 0) and (x & 14 == 0))
Min = 10**10
for A in range(1, 1000):
    if all(F(x, A) == 1 for x in range(0, 1000)):
        Min = min(Min, A)
print(Min)