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

Game history:
Turn 1: gpt-4o proposed text with target items: ["contact-us@domain.com","admin@site.edu.co","user.name@sub-domain.net","2023/10/09","09-10-2023","10.09.2023","&amp;","&#169;","&lt;","&notambiguous;","A-123-B","CD-456-78"]
Current turn: 1 of 10
You are the SOLVER.

Your opponent has provided the following challenge:

Text: "Emails: contact-us@domain.com, admin@site.edu.co, user.name@sub-domain.net. Dates: 2023/10/09, 09-10-2023, and 10.09.2023. Entities: &amp;, &#169;, &lt;, and &notambiguous;. IDs: A-123-B, CD-456-78, X-Y-Z, XX-21-ZZ."

You need to create a regular expression pattern that matches EXACTLY these items in the text:
[
  "contact-us@domain.com",
  "admin@site.edu.co",
  "user.name@sub-domain.net",
  "2023/10/09",
  "09-10-2023",
  "10.09.2023",
  "&amp;",
  "&#169;",
  "&lt;",
  "&notambiguous;",
  "A-123-B",
  "CD-456-78"
]

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.