import java.util.regex.Matcher;
  import java.util.regex.Pattern;
 
public class ShowMeBug {
  public static boolean isIPV6Format(String value) {
		value = value.trim();
		if(value.equals("")) {
			return false;
		}
		Pattern pattern = Pattern.compile("((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))"
				+ "|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9] [0-9])"
				+ "(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9] [0-9])){3})|:))|(([0-9A-Fa-f]{1,4}:){5}"
				+ "(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9] [0-9])"
				+ "(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9] [0-9])){3})|:))|(([0-9A-Fa-f]{1,4}:){4}"
				+ "(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4}) :((25[0-5]|2[0-4][0-9]|1[0-9][0-9]"
				+ "|[1-9] [0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9] [0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:)"
				+ "{3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]"
				+ "|[1-9] [0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9] [0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:)"
				+ "{2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]"
				+ "|[1-9] [0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9] [0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:)"
				+ "{1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]"
				+ "|[1-9] [0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9] [0-9])){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})"
				+ "|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9] [0-9])"
				+ "(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9] [0-9])){3}))|:)))(%.+)");
		return pattern.matcher(value).matches();
	}
  public static void main(String[] args) {
    System.out.println("Hello World!");
  }
}