Create List of Remaining Values from List after generating Random numbers in android

I am creating "Jacks Or Better" game in android, in that i am generating 5 random numbers from list of 52 numbers and storing it to a list now i want to store remaining 47 numbers in other list so that i can again generate random numbers from the list of remaining numbers. i did following code,

Random rng = new Random();
List<Integer> generated = new ArrayList<Integer>();
for (int i = 0; i < 5; i++) {
    while (true) {
        Integer next = rng.nextInt(52);
        if (!generated.contains(next)) {
            generated.add(next);
            openCards.add(CardArray.get(next));
            break;
        }
    }
}

The above code is for generating 5 random numbers and storing it into a list but i don't have any how to store remaining 47 numbers into other list. please help me.