pwntools

from pwn import *

host = "0.0.0.0"
port = 1111
bfsize = 1024

conn = remote(host, port)
data = conn.recvuntil("(no whitespace): ")
print "data1", data
conn.sendline("A"*16)
data = conn.recv(bfsize)
print "data2", data

id1 = data.find("Your Cookie is: ")
id2 = data.find("\nEnter")
print "cookie:", data[id1+16:id2]

# conn.interactive()