In the parts supply by Supplier#000000654, list the top five parts with the most supply cost in descending order of supply cost.
Supplier#000000654 is the name of the supplier which refers to s_name; parts with the most supply cost refer to ps_partkey where MAX(ps_supplycost);
SELECT T2.ps_partkey FROM supplier AS T1 INNER JOIN partsupp AS T2 ON T1.s_suppkey = T2.ps_suppkey WHERE T1.s_name = 'Supplier#000000654' ORDER BY T2.ps_supplycost DESC LIMIT 5