import java.time.ZoneId;
import java.util.Arrays;
import java.util.Set;

public class Main {
	public static void main(String[] args) {
		String[] arr = { "America/New_York", "GMT", "UTC", "UCT", "GMT+01:00", "UTC+01:00", "ABC" };

		// Alternatively
		Set<String> allZones = ZoneId.getAvailableZoneIds();
		Arrays.stream(arr).forEach(s -> System.out.println(allZones.contains(s) ? s : ("Unknown time-zone ID: " + s)));
	}
}