Separate the words by QRegex

[stereoMatching]

QString contents = "lll-###";
 
  QRegExp split("\\b");
 
  QStringList splitContents = contents.split(split, QString::SkipEmptyParts);
  for(QString const &data : splitContents)
  {
      qDebug() << data;
  }

QString contents = "lll-###";

  QRegExp split("\\b");

  QStringList splitContents = contents.split(split, QString::SkipEmptyParts);
  for(QString const &data : splitContents)
  {
      qDebug() << data;
  }

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What I want is "lll-", "###"
The result is "lll", "-###"

What should I do?Thanks