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:
| Club | Played | Drawn | Lost | Points for | Points against | Points difference | Points |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Club | Played | Drawn | Lost | Points for | Points against | Points difference | Points |
| Neath RFC | 26 | 2 | 7 | 704 | 473 | +231 | 53 |
| Ebbw Vale RFC | 26 | 3 | 7 | 557 | 503 | +54 | 51 |
| Newport RFC | 26 | 2 | 8 | 619 | 480 | +139 | 50 |
| Pontypridd RFC | 26 | 1 | 9 | 543 | 504 | +39 | 49 |
| Llanelli RFC | 26 | 2 | 12 | 629 | 509 | +120 | 38 |
| Glamorgan Wanderers RFC | 26 | 2 | 12 | 577 | 602 | -25 | 38 |
| Aberavon RFC | 26 | 2 | 12 | 603 | 615 | -12 | 38 |
| Cardiff RFC | 26 | 1 | 13 | 601 | 580 | +21 | 37 |
| Swansea RFC | 26 | 0 | 14 | 487 | 611 | -124 | 36 |
| Bedwas RFC | 26 | 1 | 14 | 446 | 524 | -78 | 34 |
| Bridgend Ravens | 26 | 0 | 15 | 461 | 508 | -47 | 33 |
| Maesteg RFC | 26 | 0 | 16 | 531 | 596 | -65 | 30 |
| Cross Keys RFC | 26 | 2 | 15 | 485 | 528 | -43 | 29 |
| Llandovery RFC | 26 | 0 | 19 | 482 | 692 | -210 | 21 |
| Correct as of 2007-04-18 | Correct as of 2007-04-18 | Correct as of 2007-04-18 | Correct as of 2007-04-18 | Correct as of 2007-04-18 | Correct as of 2007-04-18 | Correct as of 2007-04-18 | Correct as of 2007-04-18 |
Question:
What is the points difference for the team that has allowed 615 points against?
Answer:
-12.0