Given a linked list and an integer N, you need to find and return index where N is present in the Linked List. Return -1 if n is not present in the Linked List.

Indexing of nodes starts from 0.

Input format:
Line 1: Linked list elements (separated by space and terminated by -1)
Line 2: Integer n
Output format:
Index

**Example:**

Sample Input 1:
3 4 5 2 6 1 9 -1
5
Sample Output 1:
2
Sample Input 2:
3 4 5 2 6 1 9 -1
6
Sample Output 2:
4

**Description:**

In this question, we are given a linked list and a data. We have to **find the index of the Node which contains the data**.

**Example:**

2->1->5->4->3->NULL
In this list 5 is at 2nd index.

Algorithm:Function:C++ codeOutput