From Pre-order Tree Traversal Output to Build the Tree
First one becomes the root such as N
Some immediate ones (D G) also becomes parents up until middle (you can choose) – left sub tree parens
Then put some immediate ones (K P) as right children (in left subtree) to come to root
Then take alternate (E F L) to have the parents on the right (Goes Right, right subtree)
come back from right, take remaining (A, T), make them left children (bottom to up direction)
