Filter Contacts by Zip Code
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You are provided with a list of contacts named allContacts and a list of strings named zipCodes.

Each contact in allContacts has at least two fields: Id and MailingPostalCode.

Your task is to return a Set of Contact Ids whose Contact's MailingPostalCode matches any zip code in the zipCodes list.

zipCodes and allContacts may be empty or null.

Example 1:

Input:
allContacts =

[
   {"Id": "0038b00003H78BjAAJ", "MailingPostalCode": "75024"},
   {"Id": "0038b000034AzkgAAC", "MailingPostalCode": "66045"},
   {"Id": "0038b00003H787MAAR", "MailingPostalCode": "90403"}
   {"Id": "0038b00003H785VAAR", "MailingPostalCode": "90403"}
]

zipCodes = ['90403']

Output:[ '0038b00003H787MAAR', '0038b00003H785VAAR']


Explanation: The last two contacts have a MailingPostalCode that is in the zipCodes list. Their Ids are returned.


Example 2:

Input:
allContacts =

[
   {"Id": "0038b00003H78BjAAJ", "MailingPostalCode": "75024"},
   {"Id": "0038b000034AzkgAAC", "MailingPostalCode": "66045"},
   {"Id": "0038b00003H787MAAR", "MailingPostalCode": "90403"}
   {"Id": "0038b00003H785VAAR", "MailingPostalCode": "90403"}
]

zipCodes = ['90403', '75024']

Output: ['0038b00003H78BjAAJ', '0038b00003H787MAAR', '0038b00003H785VAAR']


Explanation: The first contact and the last two contacts have a MailingPostalCode that is in the zipCodes list. Their Ids are returned.


Example 3:

Input:
allContacts =

[
   {"Id": "0038b00003H78BjAAJ", "MailingPostalCode": "75024"},
   {"Id": "0038b000034AzkgAAC", "MailingPostalCode": "66045"},
   {"Id": "0038b00003H787MAAR", "MailingPostalCode": "90403"}
   {"Id": "0038b00003H785VAAR", "MailingPostalCode": "90403"}
]

zipCodes = ['54045']

Output:[]


Explanation: None of the Contacts had a matching MailingPostalCode, so an empty list was returned.