public static String reverse(String aString){
		//base case: end is zero, thus all was swapped
			System.out.println("string length: " + aString.length());
			String Swapped = aString.substring(aString.length()-1);			
			System.out.println("swapped " + Swapped);
			aString=aString.substring(0, aString.length()-1);
			System.out.println("aString " + aString);
			if(aString.length() <= 0 ){
				return Swapped;
			}
			else{

				return reverse(aString);
			}