Construct Tree Using Inorder and Preorder

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Given Preorder and Inorder traversal of a binary tree, create the binary tree associated with the traversals. You just need to construct the tree and return the root.

Note: Assume binary tree contains only unique elements.

Input format :

Line 1 : n (Total number of nodes in binary tree)

Line 2 : Pre order traversal

Line 3 : Inorder Traversal

Output Format :

Elements are printed level wise, each level in new line (separated by space).

Sample Input :
12
1 2 3 4 15 5 6 7 8 10 9 12
4 15 3 2 5 1 6 10 8 7 9 12
Sample Output :
1 
2 6 
3 5 7 
4 8 9 
15 10 12

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