YAXIS
| Date | Clue |
|---|---|
| 2017-05-28 | Vertical part of a plane |
| 2010-05-17 | Vertical line on a graph |
| 2008-03-02 | Plane part |
| 2006-02-19 | Graph component |
| 2005-06-10 | Part of a plane |
| 2004-09-06 | Vertical line on a graph |
| 2001-07-04 | Vertical graph component |
| Date | Clue |
|---|---|
| 2017-05-28 | Vertical part of a plane |
| 2010-05-17 | Vertical line on a graph |
| 2008-03-02 | Plane part |
| 2006-02-19 | Graph component |
| 2005-06-10 | Part of a plane |
| 2004-09-06 | Vertical line on a graph |
| 2001-07-04 | Vertical graph component |