ICOSA
| Date | Clue |
|---|---|
| 2016-10-21 | Twenty: Prefix |
| 2014-01-12 | Prefix with -hedron |
| 2013-04-16 | Twenty: Prefix |
| 2012-08-25 | Prefix with -hedron |
| 2007-03-01 | Prefix with -hedron |
| 1995-04-04 | Twenty: Prefix |
| Date | Clue |
|---|---|
| 2016-10-21 | Twenty: Prefix |
| 2014-01-12 | Prefix with -hedron |
| 2013-04-16 | Twenty: Prefix |
| 2012-08-25 | Prefix with -hedron |
| 2007-03-01 | Prefix with -hedron |
| 1995-04-04 | Twenty: Prefix |