text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE table_name_49 (week INTEGER, opponent VARCHAR)
  ### Question:
  What is the total number of weeks that the buffalo bills played against the San Diego Chargers?
  ### Answer:
  SELECT SUM(week) FROM table_name_49 WHERE opponent = "san diego chargers"