anchor.diff:  "COD: CONGO, DEMOCRATIC REPUBLIC OF THE",COD,COD
   COG,COG,COG
   COG: CONGO,COG,COG
  +"Congo, Republic of",COG,COG
   COK: COOK ISLANDS,COK,COK
   COL,COL,COL
   COL: COLOMBIA,COL,COL
  
positive.code: 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
  
negative.code: TONGA,TON,TON
  Trin & Tobago,TTO,TTO
  Trinidad + Tobago,TTO,TTO
  Trinidad-Tobago,TTO,TTO
  TRINIDAD AND TOBAGO,TTO,TTO
  TTO,TTO,TTO
  TTO: TRINIDAD AND TOBAGO,TTO,TTO
  