countries = ['Afghanistan','Albania','Algeria','American Samoa','Andorra','Angola','Anguilla','Antarctica','Antigua and Barbuda','Argentina','Armenia','Aruba','Australia','Austria','Azerbaijan','Bahamas','Bahrain','Bangladesh','Barbados','Belarus','Belgium','Belize','Benin','Bermuda','Bhutan','Bolivia','Bosnia and Herzegovina','Botswana','Brazil','Brunei Darussalam','Bulgaria','Burkina Faso','Burundi','Cambodia','Cameroon','Canada','Cape Verde','Cayman Islands','Central African Republic','Chad','Chile','China','Christmas Island','Cocos (Keeling) Islands','Colombia','Comoros','Democratic Republic of the Congo (Kinshasa)','Congo, Republic of (Brazzaville)','Cook Islands','Costa Rica','Ivory Coast','Croatia','Cuba','Cyprus','Czech Republic','Denmark','Djibouti','Dominica','Dominican Republic','East Timor','Ecuador','Egypt','El Salvador','Equatorial Guinea','Eritrea','Estonia','Ethiopia','Falkland Islands','Faroe Islands','Fiji','Finland','France','French Guiana','French Polynesia','French Southern Territories','Gabon','Gambia','Georgia','Germany','Ghana','Gibraltar','Great Britain','Greece','Greenland','Grenada','Guadeloupe','Guam','Guatemala','Guinea','Guinea-Bissau','Guyana','Haiti','Holy See','Honduras','Hong Kong','Hungary','Iceland','India','Indonesia','Iran','Iraq','Ireland','Israel','Italy','Jamaica','Japan','Jordan','Kazakhstan','Kenya','Kiribati','North Korea','South Korea','Kosovo','Kuwait','Kyrgyzstan','Lao, People\'s Democratic Republic','Latvia','Lebanon','Lesotho','Liberia','Libya','Liechtenstein','Lithuania','Luxembourg','Macau','Macedonia, Rep. of','Madagascar','Malawi','Malaysia','Maldives','Mali','Malta','Marshall Islands','Martinique','Mauritania','Mauritius','Mayotte','Mexico','Micronesia, Federal States of','Moldova, Republic of','Monaco','Mongolia','Montenegro','Montserrat','Morocco','Mozambique','Myanmar, Burma','Namibia','Nauru','Nepal','Netherlands','Netherlands Antilles','New Caledonia','New Zealand','Nicaragua','Niger','Nigeria','Niue','Northern Mariana Islands','Norway','Oman','Pakistan','Palau','Palestinian territories','Panama','Papua New Guinea','Paraguay','Peru','Philippines','Pitcairn Island','Poland','Portugal','Puerto Rico','Qatar','Reunion Island','Romania','Russian Federation','Rwanda','Saint Kitts and Nevis','Saint Lucia','Saint Vincent and the Grenadines','Samoa','San Marino','Sao Tome and Principe','Saudi Arabia','Senegal','Serbia','Seychelles','Sierra Leone','Singapore','Slovakia','Slovenia','Solomon Islands','Somalia','South Africa','South Sudan','Spain','Sri Lanka','Sudan','Suriname','Swaziland','Sweden','Switzerland','Syria, Syrian Arab Republic','Taiwan','Tajikistan','Tanzania; officially the United Republic of Tanzania','Thailand','Tibet','Timor-Leste','Togo','Tokelau','Tonga','Trinidad and Tobago','Tunisia','Turkey','Turkmenistan','Turks and Caicos Islands','Tuvalu','Uganda','Ukraine','United Arab Emirates','United Kingdom','USA','Uruguay','Uzbekistan','Vanuatu','Vatican City State','Venezuela','Vietnam','Virgin Islands (British)','Virgin Islands (U.S.)','Wallis and Futuna Islands','Western Sahara','Yemen','Zambia','Zimbabwe']
commonCities = ['Tokyo','Jakarta','Seoul','Delhi','Shanghai','Manila','Karachi','New York','Sao Paulo','Mexico City','Cairo','Beijing','Osaka','Mumbai (Bombay)','Guangzhou','Moscow','Los Angeles','Calcutta','Dhaka','Buenos Aires','Istanbul','Rio de Janeiro','Shenzhen','Lagos','Paris','Nagoya','Lima','Chicago','Kinshasa','Tianjin','Chennai','Bogota','Bengaluru','London','Taipei','Ho Chi Minh City (Saigon)','Dongguan','Hyderabad','Chengdu','Lahore','Johannesburg','Tehran','Essen','Bangkok','Hong Kong','Wuhan','Ahmedabad','Chongqung','Baghdad','Hangzhou','Toronto','Kuala Lumpur','Santiago','Dallas-Fort Worth','Quanzhou','Miami','Shenyang','Belo Horizonte','Philadelphia','Nanjing','Madrid','Houston','Xi\'an-Xianyang','Milan','Luanda','Pune','Singapore','Riyadh','Khartoum','Saint Petersburg','Atlanta','Surat','Washington','Bandung','Surabaya','Yangoon','Alexandria','Guadalajara','Harbin','Boston','Zhengzhou','Qingdao','Abidjan','Barcelona','Monterrey','Ankara','Suzhou','Phoenix-Mesa','Salvador','Porto Alegre','Rome','Accra','Sydney','Recife','Naples','Detroit','Dalian','Fuzhou','Medellin','San Francisco','Silicon Valley','Portland','Seattle','Austin','Denver','Boulder']