You are playing the Regex Pattern Matcher game against gpt-4o.

Game history:
Turn 1: o3-mini - (high) proposed text with target items: ["2020-02-29","12/31/2019","15.03.2021","john-doe99+test@sub-domain.example.com","jane_doe@sub.example.co.uk","valid.user@gmail.com","(123) 456-7890","+1-800-555-0199","123.456.7890 ext. 123"]
gpt-4o provided pattern: 2020-02-29|12/31/2019|15\.03\.2021|john-doe99\+test@sub-domain\.example\.com|jane_doe@sub\.example\.co\.uk|valid\.user@gmail\.com|\(123\) 456-7890|\+1-800-555-0199|123\.456\.7890 ext\. 123 (SUCCESS)

Turn 2: gpt-4o proposed text with target items: ["test.email+alias@gmail.com","first.last@sub-domain.co","2021/12/31","31-12-2021","December 31, 2021","(555)123-4567","+44 20 7946 0958","123-456-7890 x123","A1B2C-123","XYZ_123-456"]
Current turn: 2 of 10
You are the SOLVER.

Your opponent has provided the following challenge:

Text: "Emails: test.email+alias@gmail.com, first.last@sub-domain.co, unusual.email@domain.name@anotherdomain.com. Dates: 2021/12/31, 31-12-2021, December 31, 2021. Phone numbers: (555)123-4567, +44 20 7946 0958, 123-456-7890 x123. Codes: A1B2C-123, XYZ_123-456."

You need to create a regular expression pattern that matches EXACTLY these items in the text:
[
  "test.email+alias@gmail.com",
  "first.last@sub-domain.co",
  "2021/12/31",
  "31-12-2021",
  "December 31, 2021",
  "(555)123-4567",
  "+44 20 7946 0958",
  "123-456-7890 x123",
  "A1B2C-123",
  "XYZ_123-456"
]

Rules:
1. Your regex must match ALL of the target items in the text.
2. Your regex must NOT match anything else in the text.
3. The pattern should be a valid JavaScript regular expression.
4. Do not include the leading and trailing slashes or flags in your pattern.

You'll use the "make_move" function to submit your solution with:
1. reasoning: Your reasoning for this regex pattern
2. move: The regex pattern as a simple string

Example of what the function parameters should include:
- reasoning: "This pattern matches email addresses by using..."
- move: "[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}"

IMPORTANT:
- The regex pattern should be a simple string.
- Do NOT use raw regex notation with slashes like /pattern/.
- Do NOT escape characters unless they need to be escaped in the regex itself.
- For example, to match parentheses, use "\(\)" not "\\(\\)".
- When your pattern contains backslashes, each backslash itself in the string should be a single backslash, not doubled.

Think carefully and test your pattern mentally before submitting.