# cul.py

import sys

opts = [opt for opt in sys.argv[1:] if opt.startswith("-")]
args = [arg for arg in sys.argv[1:] if not arg.startswith("-")]

if "-c" in opts:
    print(" ".join(arg.capitalize() for arg in args))
elif "-u" in opts:
    print(" ".join(arg.upper() for arg in args))
elif "-l" in opts:
    print(" ".join(arg.lower() for arg in args))
else:
    raise SystemExit(f"Usage: {sys.argv[0]} (-c | -u | -l) <arguments>...")


# ejecutar
# python3 cul.py -c un deux trois
# python3 cul.py