public static void printResults() {
		if (Solutions.isEmpty()) {
			System.out.println("No solution found. \n");
		}else  {
			for (int i = 0; i < Solutions.size(); i++) {
				String soln = Solutions.get(i);
				System.out.println("Solutions found: ");
				System.out.println(soln);
			}
			System.out.println("all done.");
			System.out.println("\n");
		}
		
	}