public class Main {

	protected static ArrayList<String> Letter = new ArrayList<String>();
	private static String[] letters;
	private static String l;

	public static void main(String args[]) {

		System.out.println("Welcome to the Word Generator");
		System.out.println("Please enter a comma separated list of letters ranging from 2-10 characters");

		Scanner input = new Scanner(System.in);
		l = input.nextLine();
		letters = l.split(",");
		//while the input does not meet constraints, keep asking to reenter input
		while (letters.length <= 1 || letters.length >= 9 || checkFormat(letters) == false) {
			letters = null;
			l = null;
			System.out.println("Error: The list must be between 2 and 10 characters long");
			System.out.println("Please reenter your list:");
			l = input.nextLine();
			letters = l.split(",");
		}

		//if input is good...
		if (letters.length >= 2 && letters.length <= 10) {
		//fill ArrayList with elements of user input
			for (int i = 0; i < Main.letters.length; i++) {
				Letter.add(letters[i]);
				}
			//close input
			input.close();
		}
		System.out.println(Letter);
}

	public static boolean checkFormat(String[] list) {
		for (int i = 0; i < l.length(); i++) {
			if (list[i].length() > 1) {
				return false;
			}
		}
		return true;
	}

}