Write a function to detect if two trees are isomorphic. Two trees are called isomorphic if one of them can be obtained from other by a series of flips, i.e. by swapping left and right children of a number of nodes. Any number of nodes at any level can have their children swapped. Two empty trees are isomorphic.
For example, following two trees are isomorphic with following sub-trees flipped: 2 and 3, NULL and 6, 7 and 8.


First line of input contains the number of test cases T. For each test case, there will be two lines of input , each of 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

Single line output, print "Yes" if trees are isomorphic else print "No".

Your Task:
You don't need to take input. Just complete the function isIsomorphic() that takes root nodes of both the tree as parameter and returns a boolean value.



1 2 3 4
1 3 2 4
1 2 3 4
1 3 2 N N N 4

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

Contributor: Saksham Raj Seth
Author: saksham seth

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