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:
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.
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".
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
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