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    Python3 soln:

    def getNode(llist, positionFromTail):
            """
            find length of list
            position from head = length - position from tail
            iterate again, if traversals = position, print value
            """
            length, traversals = 0,0
            current = llist
            while current:
                    length += 1
                    current = current.next
    
            positionFromHead = length-positionFromTail-1
            for i in range(positionFromHead):
                    llist = llist.next
    
    return llist.data