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