This is a good warm-up exercise
1------------------------------------0-1-3
2-----------------------------0-1-3-------
3------------------------0-2--------------
4-----------------0-2-3------------------
5----------0-2-3-------------------------
6—--0-1-3--------------------------------
Then
1---3-1-0---------------------------------
2----------3-1-0--------------------------
3-----------------2-0---------------------
4----------------------3-2-0--------------
5-----------------------------3-2-0-------
6------------------------------------3-1-0
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