import hou
selectedItems = hou.selectedItems()
num = len(selectedItems)
if num == 1:
	select = selectedItems[0]
	parent = select.parent()
	for i in range(0,12):
		null = parent.createNode("null")
		null.setName("OUT_"+str(i),unique_name = True)
		timeShift = parent.createNode("timeshift")
		null.setInput(0,timeShift)
		exp = "substr($OS,9,10)"
		timeShift.setInput(0,select)
		timeShift.parm("frame").deleteAllKeyframes()
		timeShift.parm("frame").setExpression(exp)
else:
	print "please select 1 node!"