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:
| Week | Date | Opponent | Result | Attendance |
| --- | --- | --- | --- | --- |
| 1 | September 13, 1987 | Cleveland Browns | W 28–21 | 59,900 |
| 2 | September 20, 1987 | at Philadelphia Eagles | L 27–21 | 57,485 |
| – | September 27, 1987 | Atlanta Falcons | canceled |  |
| 3 | October 4, 1987 | Los Angeles Rams | W 37–10 | 29,745 |
| 4 | October 11, 1987 | at St. Louis Cardinals | L 24–19 | 11,795 |
| 5 | October 18, 1987 | at Chicago Bears | W 19–17 | 46,813 |
| 6 | October 25, 1987 | San Francisco 49ers | L 24–22 | 60,497 |
| 7 | November 1, 1987 | at Atlanta Falcons | W 38–0 | 42,196 |
| 8 | November 8, 1987 | at Los Angeles Rams | W 31–14 | 43,379 |
| 9 | November 15, 1987 | at San Francisco 49ers | W 26–24 | 60,436 |
| 10 | November 22, 1987 | New York Giants | W 23–14 | 67,639 |
| 11 | November 29, 1987 | at Pittsburgh Steelers | W 20–16 | 47,896 |
| 12 | December 6, 1987 | Tampa Bay Buccaneers | W 44–34 | 66,471 |
| 13 | December 13, 1987 | Houston Oilers | W 24–10 | 68,257 |
| 14 | December 20, 1987 | at Cincinnati Bengals | W 41–24 | 43,424 |
| 15 | December 27, 1987 | Green Bay Packers | W 33–24 | 68,364 |
Question:
what week was their last loss?
Answer:
6