def standard_team(team):
 team = team.lower()
 for variants in teams:
  for variant in variants:
   if (team == variant.lower()):
    return variants[0]
 return None

def standard_team ( team ) : team = team . lower ( ) for variants in teams : for variant in variants : if ( team == variant . lower ( ) ) : return variants [ 0 ] return None
returns a standard abbreviation when team corresponds to a team in nflgame .