user 0, cookie 0
user 1, cookie 1
user 2, cookie 4
user 3, cookie 9
user 4, cookie 16
user 5, cookie 25
user 6, cookie 36
user 7, cookie 49
user 8, cookie 64
user 9, cookie 81
deleting id 0
deleting id 1
deleting id 2
deleting id 3
deleting id 4
deleting id 5
deleting id 6
deleting id 7
deleting id 8
deleting id 9