!7

p {
  S listName = "heise.de 2018/04/20 (raw) | Similar lines";
  L<S> items = mechList(listName);
  S prefix = commonPrefixCI(items);
  if (nempty(prefix))
    mechListAppend(listName + " | Theories", "All lines start with " + quote(prefix));
    
  /*S suffix = commonSuffixCI(items);
  if (nempty(suffix))
    mechListAppend(listName + " | Theories", "All lines end with " + quote(suffix));*/
}