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