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Given two linked lists of size N which is sorted in ascending order. Merge them in-place and return head of the merged list.

Note: It is strongly recommended to do merging in-place using O(1) extra space.

Input:
First line of input contains number of testcases T. For each testcase, first line of input contains N and M, and next two line contains sorted lists of size N and M.

Output:
For each testcase, print the merged list in sorted form.

User Task:
The task is to complete the function SortedMerge() which takes references to the heads of two linked lists as the arguments and returns the head of merged linked list.

Constraints:
1 <= T <= 200
1 <= N, M <= 103
1 <= Node's data <= 103

Example:
Input:
2
4 3
5 10 15 40 
2 3 20
2 2
1 1
2 4 

Output:
2 3 5 10 15 20 40
1 1 2 4

Explanation:
Testcase 1: After merging the two linked lists, we have merged list as 2, 3, 5, 10, 15, 20, 40.

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

Contributor: Amit Khandelwal
Author: kartik
Editorial


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