0. (define t '(10 (5 (3 () ())
1.                   (1 () ()))
2.                (12 (14 (20 ()())
3.                        (24 ()()))
4.                    (16 ()()))))

=>

load-handler: expected a `module' declaration for `pasterack' in "paste 63151", but found something else

Check that paste includes #lang?