What is the opening time of the active businesses in Surprise that has a low review count.
active business refers to active = 'true'; 'Surprise' is the name of city;  low review count refers to review_count = 'Low'
SELECT T2.opening_time FROM Business AS T1 INNER JOIN Business_Hours AS T2 ON T1.business_id = T2.business_id INNER JOIN Days AS T3 ON T2.day_id = T3.day_id WHERE T1.city LIKE 'Surprise' AND T1.active LIKE 'TRUE' AND T1.review_count LIKE 'Low' GROUP BY T2.opening_time