Assess the level of the emotion joy in the tweet provided. Use the following categories: 0: no joy can be inferred, 1: low amount of joy can be inferred, 2: moderate amount of joy can be inferred, 3: high amount of joy can be inferred.
Tweet: Learning is key while converting your leaning to someone else is door, so when you do both you will open the door of success.\n\n #x33
1: low amount of joy can be inferred