The following is a blank outline map of Iran. Memorize it! How? This map looks like a cat. On the other hand, Persian (Iranian) cats are one of the oldest cat breeds ... so by seeing this map you may remember Iran (Persia).
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Now, memorize the following country maps by making an association; it does not matter if your association be strange or funny, it must be something that can easily make you remember the country of a map.