anchor.diff:  272,Duiven,nl
   273,Innsbruck,at
   274,Barendrecht (Rotterdam),nl
  -275,Rothenburg LU (de),ch
  -278,Brno,ch
  +275,Rothenburg LU,ch
  +278,Brno,cz
   285,Paris Ouest Vélizy,fr
   289,Lübeck,de
  -290,Lyssach BE (de),ch
  -291,Dietlikon ZH (de),ch
  -292,Pratteln BL (de),ch
  +290,Lyssach BE,ch
  +291,Dietlikon ZH,ch
  +292,Pratteln BL,ch
   294,Wrocław,pl
   298,Aarhus,dk
   306,Katowice,pl
   307,Warszawa / Targówek,pl
  -309,Ostrava,ch
  +309,Ostrava,cz
   312,Hengelo,nl
   315,Toulon,fr
   316,Nantes,fr
  
positive.code: 522,Goyang,kr
  548,Exeter,gb
  567,Greenwich,gb
  917,St. Gallen SG (de),ch
  918,Vernier GE (fr),ch
  
negative.code: 172,Odense,dk
  174,Kassel,de
  177,Rennes,fr
  178,Praha-Zličín,cz
  179,Wilrijk,be
  184,Osnabrück,de
  185,Milton Keynes,gb
  