What are the coupon amount of the coupons owned by both good and bad customers?
return customers ;return #1 that  are good ;return #1 that  are bad ;return coupons owned by #2 ;return coupons owned by #3 ;return coupons in both #4 and #5 ;return coupon amounts of #6
['select', 'filter', 'filter', 'project', 'project', 'intersection', 'project']