You should make 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,..................., 100,.................., 1,000,..................................................................................., 300,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000...................... ...well maybe you won't live that long.
Its hard. If you have to get a city in a big country like Canada, US, China, Russia, or Australia, there's a high probability that you can't do it. But if it is in a country you know well, you ROCK!