static SinglyLinkedListNode insertNodeAtPosition(SinglyLinkedListNode head, int data, int position) {

    SinglyLinkedListNode new_node = new SinglyLinkedListNode(data);

    SinglyLinkedListNode cnode = head;
    while(--position > 0)
    {
        cnode = cnode.next;

    }

    new_node.next = cnode.next;
    cnode.next = new_node;
    return head;


}