You are playing the Regex Pattern Matcher game against claude 3.5 sonnet.

Game history:
Turn 1: o3-mini - (high) proposed text with target items: ["alice.b+test@alpha-beta.com","carol99@beta.gamma.org","+1-(800)-555-0199","800.555.0199","(800) 555 0199","2020-02-29","29/02/2020","15.07.2021 08:30","xyz-xyz","ABc-123-ABc"]
claude 3.5 sonnet provided pattern: (?:(?:[a-zA-Z0-9.]+\+?[a-zA-Z0-9]+@[a-zA-Z0-9-]+\.[a-zA-Z.]+)|(?:\+1-\(800\)-555-0199|800\.555\.0199|\(800\) 555 0199)|(?:2020-02-29|29/02/2020|15\.07\.2021 08:30)|(?:xyz-xyz)|(?:ABc-123-ABc)) (SUCCESS)

Turn 2: claude 3.5 sonnet proposed text with target items: ["(nested[level{2}]group)","[test(group)here]","{valid}group","#FF00ff","#A1B2C3","#999999","f(x) = 2x + 1","g(x,y) = x^2 + y^2","h(a,b,c) = a + b + c","v1.2.3-alpha.1","v2.0.0-beta.2","v0.15.7-rc.1","<user>john_doe</user>","<time>15:30:45</time>","<date>2024-03-15</date>"]
Current turn: 2 of 10
You are the SOLVER.

Your opponent has provided the following challenge:

Text: "Valid: (nested[level{2}]group) [test(group)here] {valid}group
Reject: (bad[group} [unmatched) {wrong]group
HexColors: #FF00ff #A1B2C3 #999999
Not hex: #GGHHII #12345 #XYZ
Equations: f(x) = 2x + 1, g(x,y) = x^2 + y^2, h(a,b,c) = a + b + c
Not equations: f(x,y = 2x, g(x) = x + , h(a,b) = a +
Versions: v1.2.3-alpha.1 v2.0.0-beta.2 v0.15.7-rc.1
Not versions: v1.2-alpha v2.0.0.beta v01.2.3
Data: <user>john_doe</user> <time>15:30:45</time> <date>2024-03-15</date>
Invalid: <user>bad name</user> <time>25:00:00</time> <date>2024-13-32</date>"

You need to create a regular expression pattern that matches EXACTLY these items in the text:
[
  "(nested[level{2}]group)",
  "[test(group)here]",
  "{valid}group",
  "#FF00ff",
  "#A1B2C3",
  "#999999",
  "f(x) = 2x + 1",
  "g(x,y) = x^2 + y^2",
  "h(a,b,c) = a + b + c",
  "v1.2.3-alpha.1",
  "v2.0.0-beta.2",
  "v0.15.7-rc.1",
  "<user>john_doe</user>",
  "<time>15:30:45</time>",
  "<date>2024-03-15</date>"
]

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.