```#!/usr/bin/env python3import refrom pwn import *
if __name__ == '__main__':	nc = remote('travelling-salesman.hsctf.com', 1337)
	while True:		string = nc.recvline()		if b"flag{" in string:			print("[+]Here is your flag:", string.decode("utf-8"))			exit(0)		if b"order:" not in string:#			print("[Debug]String= ",string)			string += nc.recvuntil(b"order: ")		string = string.decode("utf-8")
		#extract only the list of classrooms		string = re.findall(r"\[(.*)\]", string, re.DOTALL)[0] 		#sort the list of classrooms		list = [ int(x) for x in string.split(',')]		print("[!]Classrooms: ", list)		list = sorted(list)		print("[+]Classrooms sorted=",list,"\n[!]Sending...")		sorted_class = ' '.join([str(x) for x in list]) 		#send the sorted list		nc.sendline(bytes(sorted_class,"utf-8"))		print("[+]Done")```