Serialization is to store a tree in an array so that it can be later restored and Deserialization is reading tree back from the array. Now your task is to complete the function serialize which stores the tree into an array A[ ] and deSerialize which deserializes the array to tree and returns it.
Note: The structure of tree must be maintained.

Input Format:
First line of input contains the number of test cases T. For each test case, there will be only a single line of input which is a string representing the tree as described below: 

  1. The values in the string are in the order of level order traversal of the tree where, numbers denotes node values, and a character “N” denotes NULL child.

  2. For example:

    For the above tree, the string will be: 1 2 3 N N 4 6 N 5 N N 7 N

Output Format:
The output in the expected output will be the inorder traversal of the returned tree.

Your Task:
The task is to complete two methods serialize() and deSerialize().

Constraints:
1 <=T<= 100
1 <= Number of nodes<= 1000
1 <= Data of a node<= 1000

Example(To be used only for expected output):
Input

2
1 2 3
10 20 30 40 60
Output
2 1 3
40 20 60 10 30


Note: The Input/Ouput format and Example given above are used for system's internal purpose, and should be used by a user for Expected Output only. As it is a function problem, hence a user should not read any input from stdin/console, and should not print anything on stdout/console. The task is to complete the function specified, and not to write the full code.
 

** For More Input/Output Examples Use 'Expected Output' option **

Contributor: Suman Rana
Author: Shubham Joshi 1


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