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:
| No. | Train No. | Origin | Destination | Train Name |
| --- | --- | --- | --- | --- |
| 1. | 12615/2616 | Chennai | New Delhi | The Grand Trunk Express |
| 2. | 12621/2622 | Chennai | New Delhi | Tamil Nadu Express |
| 3. | 12433/2434 | Chennai | H.Nizamudin | Rajdhani Express |
| 4. | 12611/2612 | Chennai | H.Nizamudin | Garib Rath |
| 5. | 11028/11027 | Chennai | Mumbai | Mumbai Mail |
| 6. | 11042/11041 | Chennai | Mumbai | Mumbai Express |
| 7. | 12842/12841 | Chennai | Howrah | Coromandel Express |
| 8. | 12840/12839 | Chennai | Howrah | Howrah Mail |
| 9. | 12679/12680 | Chennai | Coimbatore | Intercity Express |
| 10. | 12673/12674 | Chennai | Coimbatore | Cheran Express |
| 11. | 12675/12676 | Chennai | Coimbatore | Kovai Express |
| 12. | 12243/12244 | Chennai | Coimbatore | Shatabdi Express |
| 13. | 12681/12682 | Chennai | Coimbatore | Coimbatore Express |
| 14. | 12671/12672 | Chennai | Mettupalayam (Coimbatore) | Nilgiri Express |
| 15. | 16627/16628 | Chennai | Mangalore Central | West Coast Express |
| 16. | 12601/12602 | Chennai | Mangalore Central | Mangalore Mail |
| 17. | 12685/12686 | Chennai | Mangalore Central | Superfast Express |
| 18. | 12656/12655 | Chennai | Ahmedabad | Navjivan Express |
| 19. | 12669/12670 | Chennai | Chhapra | Ganga Kaveri Express |
| 20. | 16057/16058 | Chennai | Tirupati | Saptagiri Express |
| 21. | 16053/16054 | Chennai | Tirupati | Tirupati Express |
| 22. | 16203/16204 | Chennai | Tirupati | Garudadiri Express |
| 23. | 12759/12760 | Chennai | Hyderabad | Charminar Express |
| 24. | 12603/12604 | Chennai | Hyderabad | Hyderabad Express |
| 25. | 16669/16670 | Chennai | Erode | Yercaud Express |
| 26. | 12639/12640 | Chennai | Bangalore | Brindavan Express |
| 27. | 12607/12608 | Chennai | Bangalore | Lal Bagh Express |
| 28. | 12657/12658 | Chennai | Bangalore | Bangalore Mail |
| 29. | 12027/12028 | Chennai | Bangalore | Shatabdi Express |
| 30. | 12609/12610 | Chennai | Bangalore | Bangalore Express |
| 31. | 12691/12692 | Chennai | Satya Sai Prasanthi Nilayam | Satya Sai Prasanthi Nilayam Express |
| 32. | 12007/12008 | Chennai | Mysore | Shatabdi Express |
| 33. | 16222/16221 | Chennai | Mysore | Kaveri Express |
| 34. | 16041/16042 | Chennai | Alapuzha | Alleppey Express |
| 35. | 12623/12624 | Chennai | Trivandrum | Trivandrum Mail |
| 36. | 12695/12696 | Chennai | Trivandrum | Superfast Express |
| 37. | 12697/12698 | Chennai | Trivandrum | Trivandum Express |
| 38. | 16089/16090 | Chennai | Jolarpet Junction | Yelagiri express |
| 39. | 16031/16032 | Chennai | Jammutawi | Andaman Express |
| 40. | 12687/12688 | Chennai | Dehradun | Dehradun Express |
| 41. | 12712/12711 | Chennai | Vijayawada | Pinakini Express |
| 42. | 12077/12078 | Chennai | Vijayawada | Jan Shatabdi Express |
| 43. | 12829/12830 | Chennai | Bhubaneswar | Bhubaneswar Express |
| 44. | 12967/12968 | Chennai | Jaipur | Jaipur Express |
| 45. | 16093/16094 | Chennai | Lucknow | Lucknow Express |
| 46. | 17311/17312 | Chennai | Vasco da Gama, Goa | Vasco Express |
| 47. | 17313/7314 | Chennai | Hubli | Hubli Express |
| 48. | 12689/12690 | Chennai | Nagercoil | Nagercoil Express |
| 49. | 12291/12292 | Chennai | Yeswantpur | Yeswantpur Express |
| 50. | 12755/12756 | Chennai | Haldia | Haldia Express |
| 51. | 12852/12851 | Chennai | Bilaspur | Bilaspur Express |
Question:
how many trains are going to trivandrum?
Answer:
3