Table:
text: 1964 Denver Broncos season
Regular season
Regular season
Week Date_ Opponent Result_ Game_site Record Attendance
8 November 1, 1964 at Kansas City Chiefs L 39–49 Municipal Stadium 1–7 15053
9 November 8, 1964 San Diego Chargers L 20–31 Bears Stadium 1–8 19670
10 November 15, 1964 New York Jets W 20–16 Bears Stadium 2–8 11309
11 November 20, 1964 at Boston Patriots L 7–12 Fenway Park 2–9 24979
12 November 29, 1964 Oakland Raiders T 20–20 Bears Stadium 2–9–1 15958
14 December 13, 1964 Buffalo Bills L 19–30 Bears Stadium 2–10–1 14431
15 December 20, 1964 at Houston Oilers L 15–34 Jeppesen Stadium 2–11–1 15839

Question: What is the highest week for the Denver Broncos' 1964 season against the Buffalo Bills?