Python : How to create dictionary of unique words out of list of strings where words are mixed with symbols and numbers : <p>Lets say I have 
list = ["1 I love , you / hey", "0 Because . you / are cute  ", ....]</p>

<p>I want to create a set of unique words, avoiding digits and symbols.
What would be the best way of doing it?</p>

<p>Thanks</p>
