public interface ILCS_Complete {
	/**
	 * The Longest Common Subsequence (LCS)Problem  - the Complete version
	 * Finds out the actual LCS string for two given strings 
	 * @param x - the first input string
	 * @param y - the second input string
	 * @return the string representing the LCS
	 */
	String LCS_string(String x, String y);
}