[1]
1

[1,2,3,4]
1
 \
  2
   \
    3
	 \
	  4

[5,1,4,2,3]
  5
 /
1
 \
  4
 /
2
 \
  3

[5,4,3,2,1,6,7,8,9]
        5
       / \
      4   6
     /     \
    3       7
   /         \
  2           8
 /             \
1               9

[4,2,1,3,6,5,7]
    4
   / \
  2   \
 / \   6
1   3 / \
     5   7

[8,3,1,6,4,7,10,14,13]
    8
   / \
  3   10
 / \    \
1   6    14
   / \   /
  4   7 13

[2,3,1]
2
 \
  3
   Not possible because the 1 is smaller than the 2

[6,3,2,4,5,1,8,7,9]
    6
   /
  3
 / \
2   4
     \
	  5
	   Not possible, because the 1 is smaller than the 2,3, and 4

[1,2,3,4,5,7,8,6]
1
 \
  2
   \
    3
	 \
	  4
	   \
	    5
	     \
		  7
		   \
		    8
			 Not possible, because the 6 is smaller than the 7