Level 1

       44(u)		
       \		
        18__10		
            |			
            9			
            |			
    30__19__8__11__25__33
            |      |   |
        20__7  12  26__34 
            |   |  |		
        21__6__13__27	
            |				
    31__22__5  14  28__35__36
        |   |   |   |      |
        23  1__15__29      37
            |              |
            2              38
            |              
    32__24__3__16 	   
            |  |		
            4__17			


Level 2

      66(u),18(d)	
     / 	
    44__45 	
        |		
        46__61__65
        |		
56__57__47 		
        |	
        48__62
        |	
    58__49	
        |	
        50__63
        | 	
    59__51	
        |	
        52__64
        |	
    60__53	
        |	
        54	
        |	
        55	


Level 3
          44(d)
         /
        66__67__68	
            |   |	
        69__70__71__72	
        |   |   |   |	
        73  74  75  76__77
                    |	
    78  79  80  81  |	
    |   |   |   |   |	
    82__83__84__85__86