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

Find a regex pattern that matches the following string:
1997$5D03$5D21+15:36:53.409Z [/INST] pattern:
\d{4}\$5D\d{2}\$5D\d{2}\+\d{2}:\d{2}:\d{2}\.\d{3}Z </s>