import sys
tests = [
(11, (1, 10)),
(13, (1, 3, 4, 9, 10, 12)),
(17, (1, 2, 4, 8, 9, 13, 15, 16)),
(19, (1, 4, 5, 6, 7, 9, 11, 16, 17)),
(37, (1, 10, 26)),
(53, (1, 4, 6, 7, 9, 10, 11, 13, 15, 16, 17, 24, 25, 28, 29, 36, 37, 38, 40, 42, 43, 44, 46, 47, 49, 52)),
(61, (1, 3, 8, 9, 11, 20, 23, 24, 27, 28, 33, 34, 37, 38, 41, 50, 52, 53, 58, 60)),
(71, (1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 19, 20, 24, 25, 27, 29, 30, 32, 36, 37, 38, 40, 43, 45, 48, 49, 50, 54, 57, 58, 60, 64)),
(73, (1, 3, 7, 8, 9, 10, 17, 21, 22, 24, 27, 30, 43, 46, 49, 51, 52, 56, 63, 64, 65, 66, 70, 72)),
(79, (1, 8, 10, 18, 21, 22, 38, 46, 52, 62, 64, 65, 67)),
(97, (1, 35, 36, 61, 62, 96)),
(103, (1, 2, 4, 7, 8, 9, 13, 14, 15, 16, 17, 18, 19, 23, 25, 26, 28, 29, 30, 32, 33, 34, 36, 38, 41, 46, 49, 50, 52, 55, 56, 58, 59, 60, 61, 63, 64, 66, 68, 72, 76, 79, 81, 82, 83, 91, 92, 93, 97, 98, 100)),
(107, (1, 3, 4, 9, 10, 11, 12, 13, 14, 16, 19, 23, 25, 27, 29, 30, 33, 34, 35, 36, 37, 39, 40, 41, 42, 44, 47, 48, 49, 52, 53, 56, 57, 61, 62, 64, 69, 75, 76, 79, 81, 83, 85, 86, 87, 89, 90, 92, 99, 100, 101, 102, 105)),
(109, (1, 3, 4, 5, 7, 9, 12, 15, 16, 20, 21, 22, 25, 26, 27, 28, 29, 31, 34, 35, 36, 38, 43, 45, 46, 48, 49, 60, 61, 63, 64, 66, 71, 73, 74, 75, 78, 80, 81, 82, 83, 84, 87, 88, 89, 93, 94, 97, 100, 102, 104, 105, 106, 108)),
(127, (1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 27, 32, 33, 38, 40, 47, 50, 51, 54, 61, 63, 64, 66, 73, 76, 77, 80, 87, 89, 94, 95, 100, 102, 107, 108, 111, 117, 119, 122, 123, 125, 126)),
(151, (1, 3, 8, 9, 19, 20, 24, 26, 27, 28, 29, 41, 44, 50, 53, 57, 59, 60, 64, 65, 67, 68, 70, 72, 73, 78, 79, 81, 83, 84, 86, 87, 91, 92, 94, 98, 101, 107, 110, 122, 123, 124, 125, 127, 131, 132, 142, 143, 148, 150)),
(157, (1, 3, 4, 9, 10, 11, 12, 13, 14, 16, 17, 19, 25, 27, 30, 31, 33, 35, 36, 37, 39, 40, 42, 44, 46, 47, 48, 49, 51, 52, 56, 57, 58, 64, 67, 68, 71, 75, 76, 81, 82, 86, 89, 90, 93, 99, 100, 101, 105, 106, 108, 109, 110, 111, 113, 115, 117, 118, 120, 121, 122, 124, 126, 127, 130, 132, 138, 140, 141, 143, 144, 145, 146, 147, 148, 153, 154, 156)),
]

def is_vuln(modulus):
    return all(modulus % p in l for p,l in tests)

if __name__ == "__main__":
    if is_vuln(int(sys.argv[1],0)):
        print("Vuln!")
    else:
        print("OK!")