Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE order_items (product_id VARCHAR, order_id VARCHAR)
TABLE: CREATE TABLE orders (order_id VARCHAR, date_order_placed VARCHAR)

### Question ###
Give me a list of distinct product ids from orders placed between 1975-01-01 and 1976-01-01?

### Accurate SQL ###

SELECT DISTINCT T2.product_id FROM orders AS T1 JOIN order_items AS T2 ON T1.order_id = T2.order_id WHERE T1.date_order_placed >= "1975-01-01" AND T1.date_order_placed <= "1976-01-01"