I have a list

L = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

I want to create a sublist w from L of fixed size length 4 . Start and stop are w are randomly chosen. Valid W are shown below

[1,2,3,4] 
[6,7,8,9]
[3,4,5,6]
[2,3,4,5]

etc.

(1) sublist is made on continuous elements of L
(2) Sublist is always fixed size.
(3) Sublist is made from elements from L

how this can be done in neat pythonic way ?