pls help me with Python Question !

note i need a return statement

Given a list of strings, find the difference between, the longest element in the list and the smallest element in the list. You may assume that the list has at least one element. bigDifference(['southernness', 'bulbar', 'compress', 'cricket']) 6 bigDifference(['sapienti', 'nonionized', 'clpocystitis']) 5 bigDifference(['pallmall', 'earlyish', 'idle', 'uriexpressed'] ) 7 ..Save, Compile, Run (ctrl-enter)