def main():
    buf = []
    st = time.time()
    while True:
        l, data = inp.read()
        buf.append(data)
        if len(buf) >= 20:
            end = time.time()
            print('elapsed: ' + str(end - st))
            out.write(buf[0])
            del buf[0]
            st = time.time()

        time.sleep(.001)
    return