anchor.diff:  Svishtov
   Vylchedrum 
   Ivanovo 
  -Sliven
   Sliven
   Rakovski
   Sandanski
  
positive.code: Tundzha 
  Troyan
  Berkovitsa 
  Tyrgovishte
  Vratsa
  Stara Zagora 
  Gurkovo 
  Sapareva Banya 
  Lyulin
  Ruen
  Smolyan 
  Georgi-Damyanovo 
  Kocherinovo
negative.code: Iskyr 
  Chirpan 
  Zlatograd
  Dobrich 
  Sevlievo
  Kotel 
  