public class TextMessageV2
{
    public static void main(String [ ] args)
    {
        Scanner in;
        in = new Scanner(System.in);

        System.out.println("Please enter any random sentence!");
        System.out.println("Try something like \"i'll be back as soon as possible, but i may not be right back, so i'll talk to you later\"");
        System.out.print("Start your sentence here: ");
        String oldString = in.nextLine();
        String newString1 = oldString.replaceAll("i don't know", "idk");
        String newString2 = newString1.replaceAll("laughing out loud", "lol");
        String newString3 = newString2.replaceAll("be right back", "brb");
        String newString4 = newString3.replaceAll("on my way", "omw");
        String newString5 = newString4.replaceAll("good luck", "gl");
        String newString6 = newString5.replaceAll("good game", "gg");
        String newString7 = newString6.replaceAll("love", "<3");
        String newString8 = newString7.replaceAll("in my opinion", "imo");
        String newString9 = newString8.replaceAll("in my humble opinion", "imho");
        String newString10 = newString9.replaceAll("as soon as possible", "asap");
        String newString11 = newString10.replaceAll("be back later", "bbl");
        String newString12 = newString11.replaceAll("talk to you later", "ttyl");
        System.out.println("New string: " + newString12);
    }
}