Input: concept: London  answers:  ['E15 4HT', 'W1F 0HS', 'W11 3JS', 'E5 8BP', 'SW1P 2PD', 'NW1 3HB', 'E6 6ER', 'W1W5BD', 'WC1X 8RA', 'SE1 7JW']
Output: 

 what is the postcode for london?