Parse the string that starts with "A9" (include next 2 letters) and "B1" (include 2 last letters). F2-2016.

ParseString.java

import java.util.*;

public class ParseString {
    public static ArrayList<String> parse(String input) {
        ArrayList<String> result = new ArrayList<>();
        String[] splitInput = input.split(",");

        for (int i = 0; i < splitInput.length; i++) {
            String s = splitInput[i].trim();

            if (s.startsWith("A9"))
                result.add(s.substring(2, 4));
            else if (s.startsWith("B1"))
                result.add(s.substring(s.length() - 2));
        }

        return result;
    }

    public static void main(String[] args) {
        for (int i = 0; i < args.length; i++) {
            System.out.println(parse(args[i]));
        }
    }
}