List out stations number and items sold by store 17.
station number refers to station_nbr; store 17 refers to store_nbr = 17
SELECT T1.station_nbr, T2.item_nbr FROM relation AS T1 INNER JOIN sales_in_weather AS T2 ON T1.store_nbr = T2.store_nbr WHERE T1.store_nbr = 17 GROUP BY T1.station_nbr, T2.item_nbr