import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
class Main
{
  public static void main (String[] args) throws java.lang.Exception
  {
    String str = "a;b\nc;d;e;f;g\nc;d;e;f;g\nc;d;e;f;g\n\na;b\nc;d;e;f;g\nc;d;e;f;g\nc;d;e;f;g\n\na;b\n\na;b\nc;d;e;f;g\nc;d;e;f;g\nc;d;e;f;g";
    Pattern p = Pattern.compile("(?m)^(?:.+(?:\\r?\\n|\\Z)){2,}");
    Matcher m = p.matcher(str);
    while (m.find()) {
      String match = m.group();
      System.out.println(match);
    }
  }
}

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