correct the text to correct spelling, NAME_1 and present tense (follow the original content as much as possible): """The FibFib number sequence is a sequence similar to the Fibonacci sequence that is defined as follows:
    fibfib(0) == 0
    fibfib(1) == 0
    fibfib(2) == 1
    fibfib(n) == fibfib(n-1) + fibfib(n-2) + fibfib(n-3).
    Write a function that efficiently computes the n-th element of the FibFib number sequence.
    >>> fibfib(1)
    0
    >>> fibfib(5)
    4
    >>> fibfib(8)
    24
    """