anchor.diff:  VNM: VIET NAM,VNM,VNM
   VUT,VUT,VUT
   VUT: VANUATU,VUT,VUT
  +Wallis & Futuna,NULL,WLF
   West Africa Regional,?SA,?SA
   WEST AFRICA REGIONAL PROGRAM,?SA,?SA
   WEST BANK,PSE,PSE
   WEST BANK AND GAZA,PSE,PSE
  +Western Sahara,NULL,ESH
   Western Samoa,WSM,WSM
   Worldwide,*WO,*WO
   WSM,WSM,WSM
  
positive.code: ZMB: ZAMBIA,ZMB,ZMB
  ZWE,ZWE,ZWE
  ZWE: ZIMBABWE,ZWE,ZWE
  "ZWE: ZIMBABWE	ZWE	ZWE",,
  
negative.code: RWANDA,RWA,RWA
  SAINT KITTS AND NEVIS,KNA,KNA
  SAINT LUCIA,LCA,LCA
  SAINT PIERRE AND MIQUELON [FRANCE],SPM,SPM
  SAINT VINCENT AND THE GRENADINES,VCT,VCT
  SAMOA,WSM,WSM
  San Marino,NULL,SMR
  Sao Tome & Prin,STP,STP
  Sao Tome & Principe,STP,STP
  SAO TOME AND PRINCIPE,STP,STP
  SAU,SAU,SAU
  SAU: SAUDI ARABIA,SAU,SAU
  SAUDI ARABIA,SAU,SAU
  Saudi Arabia Moi,NULL,NULL
  SCG,SCG,~CS
  SCG: SERBIA AND MONTENEGRO,SCG,~CS
  SDN,SDN,SDN
  SDN: SUDAN,SDN,SDN
  SEN,SEN,SEN
  SEN: SENEGAL,SEN,SEN
  SENEGAL,SEN,SEN
  SERBIA,SRB,SRB
  Serbia And Montenegr,SCG,~CS
  SERBIA AND MONTENEGRO,SCG,~CS
  Serbia pre-2009,SRB,SRB
  Serbia/Monteneg,SCG,~CS
  SEYCHELLES,SYC,SYC
  SGP,SGP,SGP
  SGP: SINGAPORE,SGP,SGP
  SIERRA LEONE,SLE,SLE
  SINGAPORE,SGP,SGP
  Sint Maarten,NULL,MAF
  SLB,SLB,SLB
  SLB: SOLOMON ISLANDS,SLB,SLB
  SLE,SLE,SLE
  