anchor.diff:  AF,Afghanistan
   AL,Albania
   DZ,Algeria
  -AS,American Samoa
   AD,Andorra
   AO,Angola
   AI,Anguilla
  
positive.code: NE,Niger
  NG,Nigeria
  NU,Niue
  NF,Norfolk Island
  MP,Northern Mariana Islands
  NO,Norway
  OM,Oman
  PK,Pakistan
  
negative.code: LC,Saint Lucia
  WS,Samoa
  SM,San Marino
  SA,Saudi Arabia
  SN,Senegal
  RS,Serbia
  