testing empty lines
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@@ -10,7 +10,9 @@ problem 2: Create a exactly balanced binary search tree with 7 color words (orde
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problem 3: Draw a exactly-balanced binary search tree containing the letters of the word: uncopyrightable
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<div style="width: 100%; height: 200px; border: 1px solid #000;"></div>
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What is the pre-order traversal of the tree above?
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