Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE Discount_Coupons (coupon_amount VARCHAR, coupon_id VARCHAR); CREATE TABLE customers (coupon_id VARCHAR, good_or_bad_customer VARCHAR)
### Question:
What are the coupon amount of the coupons owned by both good and bad customers?
### Answer:
SELECT T1.coupon_amount FROM Discount_Coupons AS T1 JOIN customers AS T2 ON T1.coupon_id = T2.coupon_id WHERE T2.good_or_bad_customer = 'good' INTERSECT SELECT T1.coupon_amount FROM Discount_Coupons AS T1 JOIN customers AS T2 ON T1.coupon_id = T2.coupon_id WHERE T2.good_or_bad_customer = 'bad'