| Letter | Length | Country | % Correct |
|---|---|---|---|
| C | 4 | Chad/Cuba | 88%
|
| O | 4 | Oman | 84%
|
| Y | 5 | Yemen | 83%
|
| F | 4 | Fiji | 82%
|
| I | 4 | Iran/Iraq | 81%
|
| Q | 5 | Qatar | 81%
|
| Z | 6 | Zambia | 81%
|
| H | 5 | Haiti | 79%
|
| J | 5 | Japan | 79%
|
| L | 4 | Laos | 79%
|
| Z | 8 | Zimbabwe | 79%
|
| V | 7 | Vanuatu/Vietnam | 78%
|
| D | 28 | Democratic Republic of the Congo | 77%
|
| M | 4 | Mali | 76%
|
| N | 5 | Nauru/Nepal/Niger | 76%
|
| P | 4 | Peru | 75%
|
| G | 5 | Ghana/Gabon | 74%
|
| K | 10 | Kazakhstan/Kyrgyzstan | 74%
|
| R | 6 | Russia/Rwanda | 74%
|
| S | 5 | Samoa/Spain/Sudan/Syria | 74%
|
| A | 17 | Antigua and Barbuda | 73%
|
| T | 4 | Togo | 73%
|
| D | 7 | Denmark | 72%
|
| J | 7 | Jamaica | 72%
|
| B | 5 | Benin | 71%
|
| H | 8 | Honduras | 69%
|
| U | 6 | Uganda | 69%
|
| F | 27 | Federated States of Micronesia | 68%
|
| K | 5 | Kenya | 67%
|
| R | 18 | Republic of the Congo | 67%
|
| A | 6 | Angola | 63%
|
| L | 13 | Liechtenstein | 59%
|
| S | 27 | Saint Vincent and the Grenadines | 59%
|
| U | 18 | United Arab Emirates | 59%
|
| T | 17 | Trinidad and Tobago | 57%
|
| V | 11 | Vatican City | 57%
|
| C | 22 | Central African Republic | 56%
|
| E | 5 | Egypt | 56%
|
| B | 20 | Bosnia and Herzegovina | 50%
|
| E | 16 | Equatorial Guinea | 48%
|
| M | 15 | Marshall Islands | 47%
|
| P | 14 | Papua New Guinea | 47%
|
| G | 12 | Guinea-Bissau | 42%
|
| N | 14 | North Macedonia | 40%
|
| I | 10 | Ivory Coast | 34%
|