gistfile1.java

public class Letters {

	public static void main(String[] args) {
		printAllLetters(3); //2 for 2 letters, 3 for 3 letters
	}

	public static void printAllLetters(int length) {
		if (length == 2) {
			for (char c = 'A'; c <= 'Z'; c++) {
				for (int i = 0; i <= 26; i++) {
					System.out.println(Character.toString(c) + i);
				}
			}
		} else {
			for (char c = 'A'; c <= 'Z'; c++) {
				for (int i = 0; i <= 9; i++) {
					for (char t = 'A'; t <= 'Z'; t++) {
						System.out.println(Character.toString(c) + i + Character.toString(t));
					}
				}
			}
		}
	}
}