Sort City Populations

You are tasked with sorting a list of cities along with their populations. Each city is represented by a string in the format 'CityName Population'. Your goal is to sort the cities by population in descending order and by name alphabetically for those with the same population. Input: - The first line contains an integer N (1 ≤ N ≤ 100) indicating the number of cities. - The next N lines each contain a city name and its population separated by a space. Output: - A single line with the sorted cities, in the format 'CityName Population', separated by commas. Example: Input: 3 NewYork 8419600 LosAngeles 3980400 Chicago 2716000 Output: NewYork 8419600, LosAngeles 3980400, Chicago 2716000