 can see the function definition by typing ":t concat" into the interpreter. Perhaps try this with other variables and functions)
 -
 - For example: concat [[1,2,3],[3,4,5]] returns [1,2,3,3,4,5]
 -}
duplicate xs = undefined

{-
 - Imitate the functinality of zip
 - The function "min x y" returns the lower of values x and y
 - For example "ziplike [1,2,3] ['a', 'b', 'c', 'd']" returns [(1,'a'), (2, 'b'), (3, 'c')
duplicate xs = undefined
duplicate xs = undefined