super.py

from pwn import *  #Using pwntools for connecting
import re
import textwrap
conn = remote('crypto.hsctf.com',8111) 
conn.recvline() 
conn.recvline() 
conn.recvline() 
s=conn.recvline() 
print s
t="abcdefghijklmnopqrstuvwxyz1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ!?_" #list of characters for bruteforcing
data =re.findall(": (.*)",s)  #finding the super secret message via regex
data =str(data[0])  #converting the message from list to string
j=12
ch=""
new=""
flag="hsctf{"
for k in range((106-12-2)/2): #total length which needs to be bruteforced 
    for i in t: #trying each and every character from the above list
        n=""
        conn.recvline()
        conn.sendline(flag+i) #sending input flag_found_till_now + new_character
        conn.recvline()
        ch=conn.recvline()
        n=re.findall(": (.*)",ch) 
        new=str(n[0])
        if(data[j:j+2]==new[j:j+2]): #checking if it matches with the secret message 
            flag=flag+i
            j=j+2
            print flag
            break
print (flag+"}") #printing the final flag

dude how to use this ?