The Texans' defense was unable to withstand the Bills' rushing offense, especially in the first half, allowing over 100 rushing yards. Nonetheless, Houston managed to keep pace throughout despite not leading all game, but gave up a go-ahead touchdown by Charles Clay on the first play off the two-minute warning, followed by Dan Carpenter's 30-yard field goal to put it away for good. The Texans lost their first game following the bye week losing to Buffalo 21-30 and dropped to 6-6 on the season. This was also Houston's first loss to the Bills since 2006.
Question: How many points did Buffalo win by?
Answer: 9