I would be glad if someone could tell me exactly which of the restrictions are nedeed. It is unclear to me why I get WA at test16.. i think that my program works as I expect just that I  have either to many or to less restrictions. which of them are nedeed? and is "Our neighbors were the Twelfth, the Twenty Fourth, and the Thirtieth islands..." relevant???
thanks

"Our neighbors were the Twelfth, the Twenty Fourth, and the Thirtieth islands..." irrelevant