1. Change the new function, count_expedited_orders_with_backordered_items_tramp,
   replacing the internal call to any with a recursive function using the tramp function
2. The modules uses Python built in facilities to get the head and tail of a list or tuple.  
   These will only work with sequences that are subscriptable.  Generators, for example are not.  
   Build head and tail functions that simulate these operations but for any sequence.  Hint: Check out the islice and chain functions in the itertools module.