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