Something

SIMPLE TEST
===========
( 1 2 3 4 5 )
( 11 12 13 14 15 )
filt- <4 ( 1 2 3 )
filt- even ( 2 4 )
acc-add 15
acc-mult 120
fib 2 1 1
fib 3 2 2
fib 4 3 3
fib 5 5 5
fib 6 8 8
sum 15
product 120
reverse ( 5 4 3 2 1 )
append ( 1 2 3 4 5 11 12 13 14 15 )
filter_odd ( 1 3 5 )
filter_even ( 2 4 )
rotate 0 ( 1 2 3 4 5 )
rotate 2 ( 3 4 5 1 2 )
rotate  7 (same as 2) ( 3 4 5 1 2 )
insert_list 3 ( 1 2 3 11 12 13 14 15 4 5 )
chop 3 ( 1 2 )


TREEINS TEST
============
sum 10
traversal ( 1 2 3 4 )
(2
  (1
    ( )
    ( )
   )
  (4
    (3
      ( )
      ( )
     )
    ( )
   )
 )

(2
  (1
    ( )
    ( )
   )
  (4
    (3
      ( )
      ( )
     )
    ( )
   )
 )

Success!