def insertNodeAtPosition(llist, data, position):
    if llist is None:
        return SinglyLinkedListNode(data, None)
        
    current = llist
    for i in range(position):
        prev = current
        current = current.next
        
    Node = SinglyLinkedListNode(data)
    prev.next = Node
    Node.next = current
    
    return llist