Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Date | Home team | Score | Away team | Notes |
| --- | --- | --- | --- | --- |
| 17 December 2007 | Foolad | 4-4 | Esteghlal Ahvaz | Foolad progress 8-7 on penalties |
| 21 December 2007 | Rah Ahan | 2-2 | Steel Azin | Rah Ahan progress 5-2 on penalties |
| 21 December 2007 | Zob Ahan | 1-1 | Esteghlal | Esteghlal progress 3-1 on penalties |
| 21 December 2007 | Bargh Shiraz | 1-0 | Paykan Tehran |  |
| 21 December 2007 | Shahin Bushehr | 2-2 | Saba Battery | Shahin Bushehr progress 6-5 on penalties |
| 24 December 2007 | Pas Hamedan | 3-0 | Persepolis |  |
| 26 February 2008 | Moghavemat Sepasi | 1-2 | Sepahan |  |
| 4 March 2008 | Sanaye Arak | 0-1 | Pegah Gilan |  |
Question:
how many ties are listed total?
Answer:
4