Tiers: 4
Stacks: 7
Containers: 22
Stack 0: 5    16   19   
Stack 1: 4    6    9    10   
Stack 2: 0    1    3    18   
Stack 3: 21   12   
Stack 4: 17   15   14   11   
Stack 5: 13   20   7    
Stack 6: 2    8