svoid ai_autocorrelateWikipedia(File dir) {
  for (File archiveFile : sortFilesAlphaNumIC(filesEndingWith(".ubc", dir))) {
    File treeFile = replaceExtension(archiveFile, ".autocorrelated");
    continue if fileExists(treeFile);
    createSuffixTreeForLCArchive(archiveFile, treeFile);
  }
}