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