---

for A in range(1001):
    count = 0
    for x in range(1024):
        f = ((x & 28 != 0) or (x & 45 != 0)) <= ((x & 17 == 0) <= (x & A != 0))
        if f == 1:
            count += 1

    if count == 1024:
        print(A)
        break