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

Find a regex pattern that matches the following string:
2001$3E01$3E10 00:52:46.834Z [/INST] pattern:
\d{4}\$3E\d{2}\$3E\d{2}\ \d{2}:\d{2}:\d{2}\.\d{3}Z </s>