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Here is the 4th BST

Here is the 5th BST

Here is the 6th BST

Here is the 7th BST

Here is the 8th BST

Here is the 9th BST

Here is the 10th BST

Here is the 11th BST

Here is the 12th BST

Here is the 13th BST

Here is the 14th BST