Welcome, Again, to the Nostradamus Server!

I am impressed! Your guess that my number begins with 512198158 was exactly right!
What do you guess are the next two digits of my number?
51219815800
51219815801
51219815802
51219815803
51219815804
51219815805
51219815806
51219815807
51219815808
51219815809
51219815810
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51219815841
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51219815851
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51219815871
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51219815899