The EURion constellation is a pattern of five small yellow, green, or orange circles repeated across areas of a banknote. The technical details of the EURion constellation are top secret, but it is known to help software programs detect a banknote in a digital image so that users cannot produce counterfeit bills. Some programs not only abort attempts to access images of banknotes but also direct the user to a website about counterfeiting laws. What currencies feature the EURion constellation? Discuss