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