| Letter | Length | Country | % Correct |
|---|---|---|---|
| Q | 5 | Qatar | 94%
|
| Y | 5 | Yemen | 92%
|
| O | 4 | Oman | 89%
|
| Z | 8 | Zimbabwe | 88%
|
| K | 10 | Kazakhstan / Kyrgyzstan | 86%
|
| M | 10 | Madagascar / Mauritania / Montenegro / Mozambique | 83%
|
| T | 12 | Turkmenistan | 83%
|
| U | 10 | Uzbekistan | 80%
|
| V | 9 | Venezuela | 79%
|
| I | 9 | Indonesia | 78%
|
| C | 8 | Cambodia / Cameroon / Colombia | 76%
|
| D | 8 | Djibouti / Dominica | 75%
|
| E | 8 | Eswatini / Ethiopia | 75%
|
| J | 7 | Jamaica | 75%
|
| A | 11 | Afghanistan | 74%
|
| F | 7 | Finland | 74%
|
| H | 8 | Honduras | 72%
|
| L | 13 | Liechtenstein | 69%
|
| R | 7 | Romania | 62%
|
| G | 9 | Guatemala | 58%
|
| P | 11 | Philippines | 54%
|
| B | 10 | Bangladesh | 53%
|
| N | 11 | Netherlands | 45%
|
| S | 11 | Switzerland | 41%
|