The goal is to match exactly the nine target strings and nothing else. Since the target items are arbitrary strings with different punctuation and formats, the simplest and safest approach is to use an alternation that lists each target exactly. For the regex, we need to escape characters that have special meaning (like '/', '.', '(', ')', '[', ']', '{', '}'). Thus the regex uses an alternation group that matches exactly one of the following: "2023/12/25", "01-15-2024", "2024.03.15", "2024/02/29", "XY-123-AB99", "YY-123-AB99", "(123)", "[456]", "{789}". This meets the problem’s requirement to only match these precise strings, no more no less.