>>> from nba import good_teams

>>> good_teams('nba.txt', 12)
['New Orleans Pelicans', 'Oklahoma City Thunder', 'Orlando Magic', 'Phoenix Suns', 'San Antonio Spurs', 'Toronto Raptors', 'Utah Jazz']
>>> good_teams('nba.txt', 15)
['San Antonio Spurs']
>>> good_teams('nba.txt', 11)
['Chicago Bulls', 'New Orleans Pelicans', 'Oklahoma City Thunder', 'Orlando Magic', 'Phoenix Suns', 'Portland Trail Blazers', 'San Antonio Spurs', 'Toronto Raptors', 'Utah Jazz']
>>> good_teams('nba.txt', 18)
[]