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