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

Find a regex pattern that matches the following string:
2009$2F09$2F21 19$2053$2016.329Z [/INST] pattern:
\d{4}\$2F\d{2}\$2F\d{2}\ \d{2}\$20\d{2}\$20\d{2}\.\d{3}Z </s>