private static String summarizeLastWords(List<String> descriptions) {
  StringBuffer output = new StringBuffer();
  boolean isFirst = true;
  for (String d: descriptions) { // External Iteration
    if (!d.isEmpty()) {
      if (!isFirst) {
        output.append(" & ");
      }
      String lastWord = lastWord(d);
      output.append(lastWord);
      isFirst = false;
    }
  }
  return output.toString();
}

private static String lastWord(final String d) {
  final int lastSpaceIndex = d.lastIndexOf(" ");
  final String lastWord;
  if (lastSpaceIndex < 0) {
    lastWord = d;
  } else {
    lastWord = d.substring(lastSpaceIndex + 1, d.length());
  }
  return lastWord;
}