public interface ILCS_Simple {
	/**
	 * The Longest Common Subsequence (LCS)Problem  - the Simple version
	 * Finds out the Length of the LCS string for two given strings 
	 * @param x - the first string
	 * @param y - the second string
	 * @return an integer representing the length of the LCS of x and y
	 */
	int LCS_length(String x, String y);
}