Criar 3 cartelas 2 não repete e comparar 1 com a 3 e mostra quantos repetem

Set<Integer> uniqueNumbers1 = new HashSet<>();
while (uniqueNumbers1.size() < 50) {
    uniqueNumbers1.add((int)(Math.random()*101));
}
List<Integer> randomNumbers1 = new ArrayList<>(uniqueNumbers1);

TextView textView1 = (TextView) findViewById(R.id.textview1);
textView1.setText(TextUtils.join(", ", randomNumbers1));

Set<Integer> uniqueNumbers2 = new HashSet<>();
while (uniqueNumbers2.size() < 50) {
    int randomNum = (int)(Math.random()*101);
    if(!randomNumbers1.contains(randomNum))
        uniqueNumbers2.add(randomNum);
}
List<Integer> randomNumbers2 = new ArrayList<>(uniqueNumbers2);

TextView textView2 = (TextView) findViewById(R.id.textview2);
textView2.setText(TextUtils.join(", ", randomNumbers2));

List<Integer> randomNumbers3 = new ArrayList<>(randomNumbers1);
randomNumbers3.retainAll(randomNumbers2);

for (Integer num : randomNumbers3) {
    int start1 = textView1.getText().toString().indexOf(num.toString());
    int end1 = start1 + num.toString().length();
    int start2 = textView2.getText().toString().indexOf(num.toString());
    int end2 = start2 + num.toString().length();

    Spannable spannable1 = new SpannableString(textView1.getText());
    spannable1.setSpan(new ForegroundColorSpan(Color.RED), start1, end1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    textView1.setText(spannable1);
    Spannable spannable2 = new SpannableString(textView2.getText());
    spannable2.setSpan(new ForegroundColorSpan(Color.RED), start2, end2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    textView2.setText(spannable2);
}

TextView textView3 = (TextView) findViewById(R.id.textview3);
Set<Integer> uniqueNumbers3 = new HashSet<>(); while (uniqueNumbers3.size() < 50) { uniqueNumbers3.add((int)(Math.random()*101)); } List<Integer> randomNumbers4 = new ArrayList<>(uniqueNumbers3);

TextView textView4 = (TextView) findViewById(R.id.textview4); textView4.setText(TextUtils.join(", ", randomNumbers4));

List<Integer> randomNumbers5 = new ArrayList<>(uniqueNumbers1);
List<Integer> randomNumbers6 = new ArrayList<>(uniqueNumbers3);
List<Integer> repeatedNumbers = new ArrayList<>(randomNumbers5);
repeatedNumbers.retainAll(randomNumbers6);

TextView textView5 = (TextView) findViewById(R.id.textview5);
String repeatedNumberText = "Números repetidos : " + repeatedNumbers.size();
textView5.setText(repeatedNumberText);



String repeatedNumber = "Números repetidos: " + randomNumbers3.size();
textView3.setText(repeatedNumber);