getting by nd number improved (when nd number is invalid it returns

null)

appointment-import/src/main/java/smash/appointment/parse/SubjectDao.java

@@ -13,7 +13,7 @@ public class SubjectDao {
 	private List<Subject>	subjects = new ArrayList<>();
 
 	public void addSubject(Subject subject, String errorPrefix) {
-		if (subject.getNdNumber() != null && !subject.getNdNumber().trim().isEmpty()) {
+		if (subject.getNdNumber() != null && !Utils.simplifyString(subject.getNdNumber()).isEmpty()) {
 			Subject existing = getByNdNumber(subject.getNdNumber());
 			if (existing != null) {
 				if (!existing.getScreeningNumber().equals(subject.getScreeningNumber())) {