public static String reverseWord(String s) {
		
		StringBuilder sb = new StringBuilder(s.length());
		for(int i=s.length() - 1;i>=0;i--) {
			sb.append(s.charAt(i));
			/* alternative method
			 * new StringBuilder(s).reverse().toString();
			 *  
			 */
		}
		return sb.toString();
	}