add old files requirements.txt

data/word_sets/american_football.txt

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+Touchdown
+Field Goal
+Kickoff
+Punt
+Fumble
+Interception
+Sack
+Blitz
+Quarterback
+Running Back
+Wide Receiver
+Tight End
+Offensive Line
+Defensive Line
+Linebacker
+Cornerback
+Safety
+Special Teams
+End Zone
+Goal Line
+Sideline
+Hash Marks
+Huddle
+Snap
+Center
+Guard
+Tackle
+Block
+Pass
+Rush
+Run
+Catch
+Tackle
+Pass Interference
+Holding
+Offside
+False Start
+Encroachment
+Delay of Game
+Face Mask
+Clipping
+Roughing the Passer
+Roughing the Kicker
+Neutral Zone Infraction
+Fair Catch
+Safety (Scoring)
+Two-Point Conversion
+Extra Point
+Play Action
+Screen Pass
+Draw Play
+Bootleg
+Hail Mary
+Flea Flicker
+Wildcat
+Sweep
+Counter
+Trap
+Option Play
+Shotgun Formation
+Pistol Formation
+I-Formation
+Single Back
+Power Run
+Zone Defense
+Man-to-Man
+Cover 2
+Cover 3
+Prevent Defense
+Audible
+Cadence
+Snap Count
+Playbook
+Red Zone
+Turnover
+Drive
+Series
+First Down
+Second Down
+Third Down
+Fourth Down
+Chain Gang
+Yard Marker
+Line of Scrimmage
+Neutral Zone
+Pocket
+Blindside
+Scramble
+Spike
+Onside Kick
+Touchback
+Coin Toss
+Kick Return
+Punt Return
+Out of Bounds
+Incomplete Pass
+Play Clock
+Helmet
+Shoulder Pads
+Cleats