Based on the given tweet, determine the level of sadness the author is experiencing. Choose from the following options: 0: no sadness can be inferred, 1: low amount of sadness can be inferred, 2: moderate amount of sadness can be inferred, 3: high amount of sadness can be inferred.
Tweet: @CovinoandRich just heard back2back,  guess that's why they call it the blues &amp; she's got the look, but I can only sing tickle sacks version
0: no sadness can be inferred