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