The pattern is built using alternation to match exactly the five target strings:
1. alice\.bob123@mail-service\.net - Escaped dots in email
2. 2023-05-17 - Exact date format
3. \(123\) 456-7890 - Escaped parentheses, exact spacing and hyphen
4. AB12-CD34 - Exact serial code
5. racecar - Exact word
The pattern is anchored with ^ and $ to ensure no partial matches, and each special character that has meaning in regex (dots, parentheses) is properly escaped.