How many four-digit numbers \(\overline{ABBA}\) are there that are
divisible by \(99\)? (The same letters are replaced by the same digits,
but different letters may or may not be the same.)
Cik ir tādu četrciparu skaitļu \(\overline{ABBA}\), kas dalās ar \(99\)?
(Vienādiem burtiem atbilst vienādi cipari, dažādiem burtiem
var atbilst arī vienādi cipari.)