Based on the tweet "@DPD_UK apparently u left a calling card... @ which address cos it certainly wasn't the address u were supposed to be delivering 2!!! #awful", categorize the level of sadness felt by the author. Select from the following: 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.