The Bears innovated the use of this largely obsolete offensive alignment to the point that its use became synonymous with "Bear's offense" in the early days of the team. Identify this pre-snap offensive alignment which fits into the BLANK in the following lyrics:
Bear down, Chicago Bears, make every play clear the way to victory;
Bear down, Chicago Bears, put up a fight with a might so fearlessly.
We'll never forget the way you thrilled the nation with your BLANK.