def getNewerVersion(oldFile, newFile):
    """Check two files to determine which is newer

       :param str oldFile: one of the two similar files
       :param str newFile: one of the two similar files

       :return: the name of newer file
    """
    if oldFile.split('.')[4] > newFile.split('.')[4]:
        return oldFile
    else:
        return newFile
