<s>[INST] <<SYS>>
You are an expert in regular expressions (regex)
<</SYS>>

Find a regex pattern that matches the following string:
1997%2402%2413T10$5D45$5D21 [/INST] pattern:
\d{4}%24\d{2}%24\d{2}T\d{2}\$5D\d{2}\$5D\d{2} </s>