To list the 4 countries - CHINA, CHAD,CANADA & CHILE you need only 8 distinct letters: A,C,D,E,H,I,L & N.
Find a 10-member subset of ABC such that enables to create the longest list of currently existing countries.
The following restrictions apply:
- Only UN current official members
- English spelling of names e.g. Spain, not Espana
- No abbreviations!
Google's list https://www.un.org/en/member-states/ recommended as database.
The most is probably 18. In fact, the only two letters left out, below, Q and X, between them are found in only 6 countries. it's possible they add some essential countries to a longer list, better than some I included, but I doubt it.
The numbers of names containing specific letters, in order lowest to high are
2 4 7 11 15 16 17 18 19 28 30 45 46 54 56 57 64 67 69 69 70 91 98 114 121 164
Identified by letter, alphabetically, they are:
a b c d e f g h i j k l m n o p q r s t u v w x y z
164 54 46 56 91 17 45 30 121 7 19 69 57 114 70 28 4 98 69 67 64 16 11 2 18 15
The program looked for countries having only a, e, i, n, o, or r or a specific combination (at a time) of four letters chosen from bcdfghjklmpstuvwyz (a set of 18). The two with the least number of countries were never included.
Coincidentally two sets of ten letters each found 18 countries that could be formed:
18 aeinorbglm
18 aeinorcgmt
The countries found for each are:
18 aeinorbglm
albania
algeria
angola
armenia
benin
gabon
gambia
georgia
iran
lebanon
liberia
mali
mongolia
namibia
niger
nigeria
oman
romania
18 aeinorcgmt
argentina
armenia
cameroon
congo
croatia
eritrea
georgia
greece
iran
monaco
montenegro
morocco
niger
nigeria
oman
romania
togo
tonga
The list was slightly modified by removing some descriptive parenthetical data, but leaving Federated States of Micronesia. The modified list is:
Afghanistan
Albania
Algeria
Andorra
Angola
Antigua and Barbuda
Argentina
Armenia
Australia
Austria
Azerbaijan
Bahamas
Bahrain
Bangladesh
Barbados
Belarus
Belgium
Belize
Benin
Bhutan
Bolivia
Bosnia and Herzegovina
Botswana
Brazil
Brunei Darussalam
Bulgaria
Burkina Faso
Burundi
Cabo Verde
Cambodia
Cameroon
Canada
Central African Republic
Chad
Chile
China
Colombia
Comoros
Congo
Costa Rica
Côte D'Ivoire
Croatia
Cuba
Cyprus
Czech Republic
Democratic People's Republic of Korea
Democratic Republic of the Congo
Denmark
Djibouti
Dominica
Dominican Republic
Ecuador
Egypt
El Salvador
Equatorial Guinea
Eritrea
Estonia
Eswatini
Ethiopia
Fiji
Finland
France
Gabon
Gambia
Georgia
Germany
Ghana
Greece
Grenada
Guatemala
Guinea
Guinea Bissau
Guyana
Haiti
Honduras
Hungary
Iceland
India
Indonesia
Iran
Iraq
Ireland
Israel
Italy
Jamaica
Japan
Jordan
Kazakhstan
Kenya
Kiribati
Kuwait
Kyrgyzstan
Lao People’s Democratic Republic
Latvia
Lebanon
Lesotho
Liberia
Libya
Liechtenstein
Lithuania
Luxembourg
Madagascar
Malawi
Malaysia
Maldives
Mali
Malta
Marshall Islands
Mauritania
Mauritius
Mexico
Micronesia (Federated States of)
Monaco
Mongolia
Montenegro
Morocco
Mozambique
Myanmar
Namibia
Nauru
Nepal
Netherlands
New Zealand
Nicaragua
Niger
Nigeria
North Macedonia
Norway
Oman
Pakistan
Palau
Panama
Papua New Guinea
Paraguay
Peru
Philippines
Poland
Portugal
Qatar
Republic of Korea
Republic of Moldova
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
Sweden
Switzerland
Syrian Arab Republic
Tajikistan
Thailand
Timor Leste
Togo
Tonga
Trinidad and Tobago
Tunisia
Turkey
Turkmenistan
Tuvalu
Uganda
Ukraine
United Arab Emirates
United Kingdom of Great Britain and Northern Ireland
United Republic of Tanzania
United States of America
Uruguay
Uzbekistan
Vanuatu
Venezuela, Bolivarian Republic of
Viet Nam
Yemen
Zambia
Zimbabwe
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Posted by Charlie
on 2020-04-10 11:28:58 |
max found by computer
