There are two singly linked lists of size **N** and **M** in a system. But, due to some programming error the end node of one of the linked list got linked into one of the node of second list, forming a inverted Y shaped list. Write a program to get the point where two linked lists intersect each other.

Above diagram shows an example with two linked list having 15 as intersection point.

**Note:** Expected time complexity is O(m + n) where m and n are lengths of two linked lists.

**Input:**

First line of input is the number of test cases T. Every test case has four lines. First line of every test case contains three numbers, **x** (number of nodes before merge point in 1st list), **y **(number of nodes before merge point in 11nd list) and **z** (number of nodes after merge point). Next three lines contain x, y and z values.

**Output:**

Print the data of the node in the linked list where two linked lists intersects.

**Your Task:**

The task is to complete the function **intersetPoint**() which finds the point of intersection of two linked list. The function should return data value of a node where two linked lists merge. If linked list do not merge at any point, then it shoudl return **-1**.

**Constraints:**

1 <= T <= 50

1 <= N <= 100

1 <= value <= 1000

**Example:
Input:**

2

2 3 2

10 20

30 40 50

5 10

2 3 2

10 20

30 40 50

10 20

**Output:**

5

10

**Explanation:
Testcase 1:** The point of intersection of two linked list is 5, means both of them get linked (intersects) with each other at node whose value is 5.

Author: kartik

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