def usage():
    """Print the usage message."""
    print('USAGE:   python3 main.py [-h -c -g -p <string> -l <loops>]\n')
    print('OPTIONS:')
    print('\t-h or --help: print the help')
    print('\t-c or --cmdl: use the command line version')
    print('\t-g or --gui: use the graphic user interface version')
    print(
        '\t-p or --profile: use the profile module to evaluate program performance.'
        )
    print('\t\t<string> is the string to use for prediction computation.')
    print('\t-l or --loops: run the profiling operation multiple times.')
    print('\t\t<loops> is the number of loops.')
