It’s a permutation that has the four mallets Notes are mallets: 1-A 2-E 3-F 4-C The pattern goes 1-4-2-3-2-3 four times I believe and you go 1-4-2-3-2-3-2-3 on the final fifth one. You do this for each set of notes going up until you reach the very top. (Don’t know that pattern at the top) Then going down it’s the same thing. You can also try starting with the 4th mallet and go 4-1-3-2-3-2. Hopefully that wasn’t TOO complicating.
This exercise is called Alternating Stroke #3. The pattern is pretty simple and the descending pattern is the same but adding a twist pattern using quarter notes on upbeats rather than the dotted quarters everytime