Translated into English, it says "I have a plan".
a similar story, quoted from the NYTimes:
In Ruin, Symbols on a Stone Hint at a Lost Asian Culture
By JOHN NOBLE WILFORD
New York Times - 05.13.2001
The New York Times
Advocates on behalf of Jews in Russia, Ukraine, the Baltic States, & Eurasia
http://www.ncsj.org/AuxPages/051301Times.shtml