

Example 1

top-+-a-+-a1   
    |   |      
    +-b +-a2   
    |          
    +-c        
               


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Example 2

1---2---3---4---5   
                    


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Example 3

top-+-a-+-b-+-c   
    |   |   |     
    +-g-|-h +-d   
        |         
        +-e---f   
                  


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Example 4

11-+-12-+-13-+-14   
   |    |    |      
   +-22-+-23 +-24   
        |    |      
        +-33 +-34   
        |           
        +-43---44   
                    


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Example 5

+-----+   +-----+   +-----+   +-----+   +-----+   
|5    |-+-|4    |-+-|3    |-+-|2    |---|1    |   
+-----+ | +-----+ | +-----+ | +-----+   +-----+   
        |         |         |                     
        |         |         | +-----+             
        |         |         +-|1    |             
        |         |           +-----+             
        |         |                               
        |         | +-----+   +-----+             
        |         +-|2    |---|1    |             
        |         | +-----+   +-----+             
        |         |                               
        |         | +-----+                       
        |         +-|1    |                       
        |           +-----+                       
        |                                         
        | +-----+   +-----+   +-----+             
        +-|3    |-+-|2    |---|1    |             
        | +-----+ | +-----+   +-----+             
        |         |                               
        |         | +-----+                       
        |         +-|1    |                       
        |           +-----+                       
        |                                         
        | +-----+   +-----+                       
        +-|2    |---|1    |                       
        | +-----+   +-----+                       
        |                                         
        | +-----+                                 
        +-|1    |                                 
          +-----+                                 
                                                  


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Example 6

 7 -+- 61 -+- 511 -+- 4111 -+- 31111 --- 211111 --- 1111111    
    |      |       |        |                                  
    |      |       |        |                                  
    +- 52 -|- 322  +- 3211  +- 22111                           
    |      |                                                   
    |      |                                                   
    +- 43  +- 421 --- 2221                                     
           |                                                   
           |                                                   
           +- 331                                              
                                                               
                                                               


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Example 7

+-----+   +-----+   +-----+   
|top  |-+-|a    |-+-|a1   |   
+-----+ | +-----+ | +-----+   
        |         |           
        | +-----+ | +-----+   
        +-|b    | +-|a2   |   
        | +-----+   +-----+   
        |                     
        | +-----+             
        +-|c    |             
          +-----+             
                              


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Example 8

+----+   +-+   
|****| +-|*|   
|****|-+ +-+   
|****| |       
|****| | +-+   
+----+ +-|*|   
       | +-+   
       |       
       | +-+   
       +-|*|   
       | +-+   
       |       
       | +-+   
       +-|*|   
       | +-+   
       |       
       | +-+   
       +-|*|   
         +-+   
               


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Example 9

+-----------------+   +-----+   +-+   
|*****************|   |*****| +-|*|   
|*****************|   |*****|   +-+   
|*****************| +-|*****|-+       
|*****************|   |*****|         
|*****************|   |*****|         
|*****************|   +-----+         
|*****************|                   
|*****************|   +-+             
|*****************|-+-|*|             
|*****************|   +-+             
|*****************|                   
|*****************|                   
|*****************|                   
|*****************|                   
|*****************|                   
|*****************|                   
|*****************|                   
+-----------------+                   
                                      


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Example 10

*-+ +-+   +-------+   
  +-|*|-+ |*******|   
  | +-+ | |*******|   
  |     | |*******|   
  |     +-|*******|   
  |     | |*******|   
  |     | |*******|   
  |     | |*******|   
  |     | +-------+   
  |     |             
  |     | +-------+   
  |     | |*******|   
  |     | |*******|   
  |     | |*******|   
  |     +-|*******|   
  |       |*******|   
  |       |*******|   
  |       |*******|   
  |       +-------+   
  |                   
  | +-+   +-------+   
  +-|*|-+ |*******|   
    +-+ | |*******|   
        | |*******|   
        +-|*******|   
        | |*******|   
        | |*******|   
        | |*******|   
        | +-------+   
        |             
        | +-------+   
        | |*******|   
        | |*******|   
        | |*******|   
        +-|*******|   
          |*******|   
          |*******|   
          |*******|   
          +-------+   
                      


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