HELIO
| Date | Clue |
|---|---|
| 2026-04-04 | Sun: Prefix |
| 2026-03-07 | Prefix with -centric |
| 2026-02-15 | Prefix meaning "sun" |
| 2025-01-05 | Prefix with -centric |
| 2023-11-17 | Head for the sun? |
| 2023-11-12 | Prefix with sphere |
| 2022-10-20 | Prefix meaning "sun" |
| 2019-07-28 | Sun: Prefix |
| 2013-07-23 | Prefix with -tropic |
| 2009-02-16 | Sun: Prefix |
| 2008-09-21 | Prefix with centric |
| 2007-01-31 | Sun: Prefix |
| 2005-11-27 | Prefix with centric |
| 2003-10-02 | Sun: Prefix |
| 2000-09-17 | Prefix with centric |
| 2000-02-15 | Sun: Prefix |
| 2000-01-07 | Prefix with tropic |
| 1998-05-13 | Sun: Prefix |
| 1994-10-23 | Sun: Prefix |