Welcome, Again, to the Nostradamus Server!

I am impressed! Your guess that my number begins with 878155173 was exactly right!
What do you guess are the next two digits of my number?
87815517300
87815517301
87815517302
87815517303
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87815517330
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87815517333
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87815517340
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87815517364
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87815517380
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87815517398
87815517399