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