#if defined(bla)
#elif defined(blu)
# if defined(bla)
# elif defined(blu)
#  if defined(bla)
#  elif defined(blu)
#	if defined(bla)
#	elif defined(blu)
  #if defined(bla)
  #elif defined(blu)
	#if defined(bla)
	#elif defined(blu)
	#	if defined(bla)
	#	elif defined(blu)