There are 27 different site numbers in sets 1-10. The first nine are just sites 1-9. The second nine are sites [tower icon]1-9. The last nine are sites [king icon]1-9. [king icon]1 and 1 are not the same. We don't have to assume an imaginary icon (though I guess doing so doesn't really hurt) because 1, T1, and K1 are all different.