import ctypes
import subprocess
import os
import sys

def fails():
  ctypes.cdll.kernel32.FreeConsole()
  subprocess.call('calc', shell = True, stdout = open(os.devnull, 'w'))

def works1():
  subprocess.call('calc', shell = True, stdout = open(os.devnull, 'w'))

def works2():
  ctypes.cdll.kernel32.FreeConsole()
  subprocess.call('calc', shell = True)

def works3():
  ctypes.cdll.kernel32.FreeConsole()
  subprocess.call('calc', shell = True, stdin = open(os.devnull, 'r'), stdout = open(os.devnull, 'w'), stderr = open(os.devnull, 'w'))

eval(sys.argv[1] + '()')