Given a Binary Tree, print Right view of it. Right view of a Binary Tree is set of nodes visible when tree is viewed from right side.

Right view of following tree is 1 3 7 8.

       /     \
     2        3
   /   \      /    \
  4     5   6    7

Input :
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 :
For each test case, in a new line, print the right view of the binary tree.

Your Task:
This is a function problem. You don't have to take input. Just complete the function rightView() that takes node as parameter and prints the right view. The newline is automatically appended by the driver code.

1 <=T<= 30
1 <= Number of nodes<= 105
1 <= Data of a node<= 105

1 3 2
10 20 30 40 60
1 2
10 30 60
Test case 1:

         /     \
      3        2
For the above test case the right view is: 1 2
Test case 2:

         /        \
     20          30
   /      \      
40      60

Right View is: 10 30 60.

Note: The Input/Ouput format and Example given 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. The task is to complete the function specified, and not to write the full code.


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

Author: kartik

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