I'm using a direct alternation approach with the pipe character (|) to match each of the exact target strings. This ensures we match only the specified items:

1. For the email addresses, I escape special characters like periods and plus signs with backslashes
2. For the alphanumeric IDs, I include them directly as they don't contain special regex characters
3. For the phone numbers, I escape parentheses and the plus sign with backslashes

This approach is the most precise as it only matches the exact strings specified in the target list. While it's verbose, it guarantees we won't have false positives from other text in the sample that might have similar patterns (like other phone numbers, dates, or SSNs).

The pattern strictly follows the requirement to match exactly the 20 specified items and nothing else.