title: If a list is found in another list?
body: <p>I started to learn Racket and I don't know how to check if a list is found in another list. Something like (member x (list 1 2 3 x 4 5)), but I want that "x" to be a a sequence of numbers. </p>
  
  <p>I know how to implement recursive, but I would like to know if it exists a more direct operator.</p>
  
  <p>For example I want to know if (list 3 4 5) is found in (list 1 2 3 4 5 6 )</p>