#!/usr/bin/python

import thread, time

def work():
  j = 0.0
  for i in xrange(10000000):
    j = j + j/2.0

def child(tid):
  print "%d start" % tid
  work()
  print "%d  stop" % tid

def parent():
  i = 0
  while True:
    i += 1
    thread.start_new(child, (i,))
    if raw_input() == 'q': break

parent()