on rightclick holding stone:
	name of held item contains "石"
	remove 1 of held item from player
	set {rnd} to a random integer between 0 to 1
		if {rnd} is 0:
			execute consel commnd "/give %player% grass 0 1"
		if {rnd} is 1:
			execute consel commnd "/give %player% stone 0 1"