Welcome, Again, to the Nostradamus Server!

I am impressed! Your guess that my number begins with 555189997 was exactly right!
What do you guess are the next two digits of my number?
55518999700
55518999701
55518999702
55518999703
55518999704
55518999705
55518999706
55518999707
55518999708
55518999709
55518999710
55518999711
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55518999751
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55518999799