Given a sorted doubly linked list and an element X, your need to insert the element X into correct position in the sorted DLL.

Example:

Input:
LinkedList:

X = 9
Output:

Your Task:
You only need to complete the function sortedInsert() that takes head reference and x as arguments and returns the head of the modified list. The printing and checking tasks are done by the driver code.

Expected Time Complexity: O(n).
Expected Auxiliary Space: O(1).

Constraints:
1 <= Number of nodes <= 10³