Floor: 0
I-C-C-C-E
        | 
O-O-O O-C
  | |   | 
O-O O-O-C
  | | | | 
O-O-O-O C
  | |   | 
O-O O-O-C
     
Floor: 1
C-C-C-C-E
    | | | 
O-O-O-O C
| | | | | 
O-O-O-O C
  | |   | 
O-O-O-O C
| | |   | 
O-O O-O C
     

