enc = [
    0xFD,0x9C,0x43,0x42,0xA1,0xA0,0xEB,0x8F,0x21,
    0x54,0x67,0x8A,0xEE,0x8C,0x3B,0x46,0x5D,0x60,
    0xC0,0x97,0x72,0x1D,0xAF,0x63,0x1A,0xF4,0xAC,
    0x6F,0xB5,0x79,0x2C,0xDA,0xD1,0x81,0x5C,0x1B,
    0x19,0x85,0x2B,0xC7,0x5A,0x7F,0x9D,0x10,
]

def decode(data):
    R1, LR = 0x17, 7
    out = []
    for b in data:
        k = R1 & 0x7F
        next_lr = (LR + 3) & 0xFF
        R1 = (R1 + 5) & 0xFF

        c = ((b ^ 0x55) - k) & 0xFF
        c = ((c << 6) | (c >> 2)) & 0xFF
        c ^= LR

        LR = next_lr
        out.append(c)
    return bytes(out)

flag = decode(enc).decode()
print(flag)