PERIODIC
| Date | Clue |
|---|---|
| 2012-06-22 | Intermittent |
| 2011-08-17 | Like Mendeleev's table |
| 2005-03-25 | Regular |
| 2004-07-08 | Like a planetary orbit |
| 1997-09-19 | Kind of table |
| 1994-10-15 | Kind of table |
| Date | Clue |
|---|---|
| 2012-06-22 | Intermittent |
| 2011-08-17 | Like Mendeleev's table |
| 2005-03-25 | Regular |
| 2004-07-08 | Like a planetary orbit |
| 1997-09-19 | Kind of table |
| 1994-10-15 | Kind of table |