#-*- coding: utf-8  -*-
<<<<<<< Updated upstream
import re
test=input()
if re.match(r'\d{4}\-\w{3,7}',test):
	print('ok')
else:
	print('failed')
=======
import threading,multiprocessing
def loop()
	x=0
	while True:
		x=x^1

for i in range(multiprocessing.cpu_count()):
	t=threading.Thread
>>>>>>> Stashed changes
