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7,
and btw, it's "which one will fill first
get your grammar right.
btw, I upvoted you anyway, despite

Let's work towards a society where all human interaction is voluntary!

Number 2?

Wrong, 😀

Okay, so please tell me!

No 7

Okay so now I'll be up the whole night trying to figure it out, and have my a-ha moment! :)

😀😍✌👍👍👍