NAME	Place ?x on ?y
IF	holding ?x
	clear ?y
ADD	?x on ?y
	clear ?x
	handEmpty
DELETE	clear ?y
	holding ?x

NAME	remove ?x from on top ?y
IF	?x on ?y
	clear ?x
	handEmpty
ADD	clear ?y
	holding ?x
DELETE	?x on ?y
	clear ?x
	handEmpty

NAME	pick up ?x from the table
IF	ontable ?x
	clear ?x
	handEmpty
ADD	holding ?x
DELETE	ontable ?x
	clear ?x
	handEmpty

NAME	put ?x down on the table
IF	holding ?x
ADD	ontable ?x
	clear ?x
	handEmpty
DELETE	holding ?x