th

import threading
import requests
from bs4 import BeautifulSoup

def get_currencies(url, id, currencies, semaphore):
    response = requests.get(url)
    if response.status_code == 200:
        semaphore.acquire()
        try:
            secret_code()
            soup = BeautifulSoup(response.text, 'html.parser')
            currency = str(soup.find_all('valute')[id])
            if currency not in currencies:
                currencies.append(currency)
        finally:
            semaphore.release()

if __name__ == '__main__':

    currencies = []
    id = int(input())
    semaphore = threading.Semaphore(4)

    threads = []
    for url in urls:
        thread = threading.Thread(target=get_currencies, args=(url, id, currencies, semaphore))
        threads.append(thread)
        thread.start()

    for thread in thread:
        thread.join()



    currencies_string = ''.join(currencies)
    print(currencies_string)