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

Find a regex pattern that matches the following string:
2007-07-31 03$3E52$3E20.101Z [/INST] pattern:
\d{4}\-\d{2}\-\d{2}\ \d{2}\$3E\d{2}\$3E\d{2}\.\d{3}Z </s>