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

Find a regex pattern that matches the following string:
2011$2B01$2B15T18:40:48.583Z [/INST] pattern:
\d{4}\$2B\d{2}\$2B\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z </s>