Rule exists

Rule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule existsRule exists