What does this input mean? I could not understand the structure of the list.

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    RT. I have a problem with this input :


    What does the # mean? Does it represent a null node? If it does, why should it appear in the middle of the list? Based on my understanding, I think the list is :

    -1 -> 8 -> 7 -> -3 -> 4 -> 4 -> -3 -> null -> null -> -1

    Does this list make sense? A null node can have a next pointer? I am quite confused and any explanation is appreciated. Thank you guys!!

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