^from-1251[]

$sValue[abcdefghijklmnopqrstuvwxyz%20ABCDEFGHIJKLMNOPQRSTUVWXYZ%0A0123456789%20%60+-%3D%7E%21@%23%24%25%5E%26*%28%29_%20%5B%5D%7B%7D%3C%3E%3B%3A%27%22%2C./%3F%0A%u0430%u0431%u0432%u0433%u0434%u0435%u0451%u0436%u0437%u0438%u0439%u043A%u043B%u043C%u043D%u043E%u043F%u0440%u0441%u0442%u0443%u0444%u0445%u0446%u0447%u0448%u0449%u044A%u044B%u044C%u044D%u044E%u044F%09%u0410%u0411%u0412%u0413%u0414%u0415%u0401%u0416%u0417%u0418%u0419%u041A%u041B%u041C%u041D%u041E%u041F%u0420%u0421%u0422%u0423%u0424%u0425%u0426%u0427%u0428%u0429%u042A%u042B%u042C%u042D%u042E%D0%AF]

$sUnescapedValue[^string:unescape[uri;$sValue; $.charset[UTF-8]]]
$sUnescapedValue
^apply-taint[xml;$sUnescapedValue]