| On the regularity of iterated hairpin completion of a single word Recent countries visiting this post |  |
 | 7 | Poland |
 | 7 | United States |
 | 3 | Russian Federation |
 | 1 | |
 | 1 | Turkey |
| On the regularity of iterated hairpin completion of a single word Recent countries visiting this post | |
| 7 | Poland |
| 7 | United States |
| 3 | Russian Federation |
| 1 | |
| 1 | Turkey |