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Given a Binary Tree of size **N**, your task is to complete the function **rightLeafSum()**, that should return the sum of all the leaf nodes that are right child of their parent of the given binary tree.

Example:

```
Input :
1
/ \
2 3
/ \ \
4 5 8
\ / \
2 6 7
Output :
sum = 2 + 5 + 7 = 14
```

**Input:**

The function takes a single arguments as input, the reference pointer to the **root** of the binary tree.

There are **T** test cases and for each test case the function will be called separately.

**Output:**

The function should return the sum of all the right leaf nodes of the binary tree.

**Constraints:**

1<=T<=100

1<=N<=100

**Example:
Input:**

2

2

1 2 L 1 3 R

5

10 20 L 10 30 R 20 40 L 20 60 R 30 90 L

3

60

**Explanation:
Test Case 1:**

Tree formed is as follows:

1

/ \

2 3

Here, there are 2 leaf nodes (2 and 3). Out of these, only 3 is a right child of its parent. Hence, the answer is 3.

**Test Case 2:**

The tree formed is as follows:

10

/ \

20 30

/ \ /

40 60 90

Here, there are 3 leaf nodes (40, 60 and 90). Out of these, only 60 is a right child of its parent. Hence, the answer is 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 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.

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Sum of Right Leaf Nodes

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