public class Sort {
	public static void main(String[] args) {
		new Sort().run();
	}

	public void run() {
		int printedString = 0;
		String[] array = { "A", "B", "C", "D", "E", "F", "G", "H", "A", "B", "C", "D", "E", "A", "B", "C", "D", "A",
				"B" };
		int[] results = new int[array.length];
		for (int i = 0; i < array.length; i++) {
			for (int j = 0; j < array.length; j++) {
				if (array[i].equals(array[j])) {
					results[i] = results[i] + 1;
				}
			}
		}
		System.out.print("The least frequent strings are: ");
		for (int i = 0; i < array.length; i++) {
		for (int j = 0; j < array.length; j++){
			if(i == results[j] && printedString < 5){
				System.out.print(array[i] + ", ");
				printedString++;
			}
			}
		}
	}
}