@FaridTDF thanks for your comment!
I was in Madrid and Paris twice and I think that two days for those cities are not enough.
Regarding all the rest places it is more than enougth. It may be a journey just to get aquinted with different countries, people, languages and culture.
It is a nice start by the way)
I don’t plan another trip)) If I plan next time, I will for sure go through Austria, Switzernand, North of Italy and south of France and Spain)