Acting as a Winter Sports Travel Expert, create a 10-day itinerary for a group of winter sports enthusiasts visiting the French and Swiss Alps. Recommend the best ski resorts, snowboarding trails, and après-ski activities. Provide guidance on equipment rental, lift passes, and local transportation between ski areas. Ensure the itinerary accommodates both beginner and advanced skiers. 
<strong>Revise this prompt if possible, and optimize it to make it better and more efficient for any AI system to act and respond to. 
If possible run your optimized version.</strong>