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:
| Train No. | Train Name | Destination | Category | Frequency |
| --- | --- | --- | --- | --- |
| 11013/11014 | Kurla Express | Lokmanya Tilak (T) Mumbai | Express | Daily |
| 12083/12084 | Janshatabdi Express | Mayiladuthurai | Janshatabdi | Except Tuesday |
| 12243/12244 | Duronto Express | Chennai | Duronto | Except Tuesday |
| 12647/12648 | Kongu Express | Hazrat Nizamuddin (New Delhi) | SF Express | Weekly |
| 12671/12672 | Nilgiri Express (slip) | Chennai | SF Express | Daily |
| 12673/12674 | Cheran Express | Chennai | SF Express | Daily |
| 12675/12676 | Kovai Express | Chennai | SF Express | Daily |
| 12679/12680 | Intercity Express | Chennai | SF Express | Daily |
| 12681/12682 | Chennai Express | Chennai | SF Express | Weekly |
| 12969/12970 | Jaipur Express | Jaipur | SF Express | Weekly |
| 16609/16610 | Nagercoil Express | Nagercoil | Express | Daily |
| 16611/16612 | Tuticorin Express | Tuticorin | Express | Daily |
| 16613/16614 | Rajkot Express | Rajkot | Express | Weekly |
| 16615/16616 | Chemmozhi Express | Mannargudi | Express | Daily |
| 16617/16618 | Rameswaram Express | Rameswaram | Express | Weekly |
| 22475/22476 | AC Express | Bikaner | SF Express | Weekly |
| 22609/22610 | Intercity Express | Mangalore | SF Express | Daily |
Question:
What is the category for trains numbered 16609/16610?
Answer:
Express