Deck of Cards Shuffling

You are given a list containing multiple decks of cards, where each deck consists of 52 unique cards. The total number of cards, n, is guaranteed to be a multiple of 52. Each card is represented as a structure containing two fields: suit and rank. Write a function to shuffle all the cards together using a custom algorithm that mimics manual shuffling. Constraints: The total number of cards, n, is guaranteed to be a multiple of 52, indicating that there are multiple decks. Each card has a suit and a rank. Suits are one of "Hearts", "Diamonds", "Clubs", "Spades". Ranks are one of "A", "2", "3", ..., "10", "J", "Q", "K". Function Signature: struct Card { std::string suit; std::string rank; }; std::list shuffleAllDecks(const std::list& all_decks); Input: The input all_decks is a std::list of Card structures containing one or more decks of cards. All the decks are combined into a single list for shuffling. Output: Return a std::list where all the cards from the input have been shuffled together. Example: Input: std::list all_decks = { {"Hearts", "A"}, {"Hearts", "2"}, {"Hearts", "3"}, ..., {"Spades", "K"}, {"Hearts", "A"}, {"Hearts", "2"}, {"Hearts", "3"}, ..., {"Spades", "K"} }; Output: std::list shuffledDecks = shuffleAllDecks(all_decks); // Example output (shuffled order): // [ // {"Diamonds", "J"}, {"Hearts", "3"}, {"Clubs", "A"}, ..., {"Hearts", "4"} // ] Explanation: The function should simulate the shuffling of all cards combined by thoroughly mixing the cards from all decks together, mimicking the randomness of manual shuffling.