1- You have to go at the Lunar Temple
http//www.Neopets.com/shenkuu/lunar/?show=puzzle
2- open the source code
3- look for Kreludor in the text of the source code
4- see what is the number after "kreludor=" and search where it is included in this chart:
0 - 11.24 = 9
11.25 - 33.74 = 10
33.75 - 56.24 = 11
56.25 - 78.74 = 12
78.75 - 101.24 = 13
101.25 - 123.74 = 14
123.75 - 146.24 = 15
146.25 - 168.74 = 16
168.75 - 191.24 = 1
191.25 - 213.74 = 2
213.75 - 236.24 = 3
236.25 - 258.74 = 4
258.75 - 281.24 = 5
281.25 - 303.74 = 6
303.75 - 326.24 = 7
326.25 - 360 = 8