Biggest World Cities within 200 Km with hints on dots

Name the cities that are more populous than any other within 200 kilometers. When you type a city you will receive letters hints on nearby cities (within 500 km) that have a smaller population. To read the hints move the mouse over the small dots that will appear. You are shown letters from the second one onwards: the number of letters shown depends on the population (you are shown more letters for smaller cities)

Answers are sorted alphabetically; you are shown the first letter that is different from the previous answer and the number of nearby cities that can activate the hinted dot.