Enter a World 1M+ city – all other 1M+ cities within 1000km will also fill in. Try to fill in all 1M cities in the smallest number of circles. Countries remaining will display when you have completed 80 countries. For Khartoum, end ‘khartoum.’ with the period to prevent entering Khartoum North. For Hyderabad, there are two, so enter ‘hyderabadin’ for India and ‘hyderabadpa’ for Pakistan.