Invalid Tweets

Task: Find the IDs of the invalid tweets. The tweet is invalid if the number of characters used in the content of the tweet is strictly greater than 15.

Table: Tweets

+-------------+--------------+
| Column Name | Type         |
+-------------+--------------+
| tweet_id    | INT          |
| content     | varchar(255) |
+-------------+--------------+

Input: Tweets table:

+----------+----------------------------------+
| tweet_id | content                          |
+----------+----------------------------------+
| 1        | Vote for Biden                   |
| 2        | Let us make America great again! |
+----------+----------------------------------+

Output:

+----------+
| tweet_id |
+----------+
| 2        |
+----------+