jess.py

from pwn import *
from concurrent.futures import ThreadPoolExecutor

def run(i):
	r = remote("mc.ax", 30376, level='error')
	r.recv()
	for k in bin(i)[2:].zfill(15):
		r.recv()
		r.send(b"n\n") if k == '0' else r.send(b"y\n")
	r.send(b"y\n")
	a = r.recv()
	r.send(b"\n")
	b = r.recv()
	if b"bucket" in a:
		print(i, a, b)
	r.close()

with ThreadPoolExecutor(128) as w:
	w.map(run, range(2**15))