anchor.diff:  KBTM,Butte,Montana
   KBTR,Baton Rouge,Louisiana
   KBTV,Burlington,Vermont
  -KBUF,Buffalo,New york
  +KBUF,Buffalo,New York
   KBUR,Burbank,California
   KBVU,Boulder City,Nevada
   KBWI,Baltimore/Glen Burnie,Maryland
   KBZN,Bozeman,Montana
  -KCAE,Columbia,South carolina
  +KCAE,Columbia,South Carolina
   KCAK,Akron/Canton,Ohio
   KCEC,Crescent City,California
   KCHA,Chattanooga,Tennessee
   KCHO,Charlottesville,Virginia
  -KCHS,Charleston,South carolina
  +KCHS,Charleston,South Carolina
   KCIC,Chico,California
   KCID,Cedar Rapids,Iowa
   KCIU,Sault Ste. Marie,Michigan
  
positive.code: KECP,Panama City Beach,Florida
  KEGE,Eagle,Colorado
  KEKO,Elko,Nevada
  KELM,Elmira/Corning,New york
  KELP,El Paso,Texas
  KENV,Wendover,Utah
  KERI,Erie,Pennsylvania
  KESC,Escanaba,Michigan
  KEUG,Eugene,Oregon
  KEVV,Evansville,Indiana
  KEWN,New Bern,North carolina
  KEWR,Newark,New jersey
  KEYW,Key West,Florida
  KFAR,Fargo,North dakota
  KFAT,Fresno,California
  KFAY,Fayetteville,North carolina
  KFHR,Friday Harbor,Washington
  KFLG,Flagstaff,Arizona
  KFLL,Fort Lauderdale,Florida
  KFLO,Florence,South carolina
  KFMN,Farmington,New mexico
  KFNT,Flint,Michigan
  KFSD,Sioux Falls,South dakota
  KFSM,Fort Smith,Arkansas
  KFWA,Fort Wayne,Indiana
  KGCC,Gillette,Wyoming
  KGCK,Garden City,Kansas
  KGCN,Grand Canyon/Tusayan,Arizona
  KGEG,Spokane,Washington
  KGFK,Grand Forks,North dakota
  KGGG,Longview,Texas
  KGJT,Grand Junction,Colorado
  KGNV,Gainesville,Florida
  
negative.code: KCLE,Cleveland,Ohio
  KCLL,College Station,Texas
  KCLM,Port Angeles,Washington
  KCLT,Charlotte,North Carolina
  KCMH,Columbus,Ohio
  KCMI,Champaign/Urbana,Illinois
  KCMX,Hancock/Calumet,Michigan
  