anchor.diff:  "Qiqihar, China ",NDG
   "Qualicum, BC ",XQU
   "Quaqtaq, QC ",YQC
  -"Quebec, QC - Charny Rail service ",YFZ
   "Quebec, QC - International Airport ",YQB
  -"Quebec, QC - Levis Rail service ",XLK
  -"Quebec, QC - Quebec Station Rail service ",XLJ
  -"Quebec, QC - Sainte-Foy Rail service ",XFY
   "Queenstown, New Zealand ",ZQN
   "Quelimane, Mozambique ",UEL
   "Quepos, Costa Rica ",XQP
  
positive.code: "Maun, Botswana ",MUB
  "Maupiti, French Polynesia ",MAU
  "Mauritius, Mauritius ",MRU
  "Maxville, ON - Rail service ",XID
  "Mayaguana, Bahamas ",MYG
  "Mayaguez, Puerto Rico ",MAZ
  "Mazatlan, Mexico ",MZT
  
negative.code: "Vancouver, BC ",YVR
  "Vancouver, BC - Coal Harbour ",CXH
  "Vancouver, BC - International ",YVR
  "Vanimo, Papua New Guinea ",VAI
  "Vanuabalavu, Fiji ",VBV
  "Varadero, Cuba ",VRA
  