anchor.diff:  "NUTS_SE232","Västra Götalands län","Sweden","NUTS3"
   "NUTS_PT16E","Região de Coimbra","Portugal","NUTS3"
   "NUTS_BE351","Arr. Dinant","Belgium","NUTS3"
  -"NUTS_CH025","Jura","Switzerland","NUTS3"
   "NUTS_CZ063","Kraj Vysocina","Czechia","NUTS3"
   "NUTS_FRK21","Ain","France","NUTS3"
   "NUTS_FI1D5","Keski-Pohjanmaa","Finland","NUTS3"
  
positive.code: "NUTS_FRJ11","Aude","France","NUTS3"
  "NUTS_CH051","Glarus","Switzerland","NUTS3"
  "NUTS_DK041","Vestjylland","Denmark","NUTS3"
  "NUTS_PT150","Algarve","Portugal","NUTS3"
  "NUTS_SE213","Kalmar län","Sweden","NUTS3"
  "NUTS_FRK23","Drôme","France","NUTS3"
  "NUTS_PT200","Região Autónoma dos Açores (PT)","Portugal","NUTS3"
  "NUTS_PT187","Alentejo Central","Portugal","NUTS3"
  "NUTS_FRD22","Seine-Maritime","France","NUTS3"
  "NUTS_FI1B1","Helsinki-Uusimaa","Finland","NUTS3"
  "NUTS_BE345","Arr. Virton","Belgium","NUTS3"
  "NUTS_DK021","Østsjælland","Denmark","NUTS3"
  "NUTS_DK012","Københavns omegn","Denmark","NUTS3"
  "NUTS_BE327","Arr. Tournai","Belgium","NUTS3"
  "NUTS_PT170","Área Metropolitana de Lisboa","Portugal","NUTS3"
  "NUTS_FRJ13","Hérault","France","NUTS3"
  "NUTS_FRJ22","Aveyron","France","NUTS3"
  "NUTS_FRG02","Maine-et-Loire","France","NUTS3"
  
negative.code: "NUTS_DK032","Sydjylland","Denmark","NUTS3"
  "NUTS_BG311","Vidin","Bulgaria","NUTS3"
  "NUTS_PT16J","Beiras e Serra da Estrela","Portugal","NUTS3"
  "NUTS_LT022","Kauno apskritis","Lithuania","NUTS3"
  "NUTS_BG322","Gabrovo","Bulgaria","NUTS3"
  "NUTS_FI1C4","Kymenlaakso","Finland","NUTS3"
  "NUTS_CZ072","Zlínský kraj","Czechia","NUTS3"
  "NUTS_PT16B","Oeste","Portugal","NUTS3"
  "NUTS_CH057","Thurgau","Switzerland","NUTS3"
  "NUTS_CH033","Aargau","Switzerland","NUTS3"
  