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

Find a regex pattern that matches the following string:
2003$5B10$5B12T15$5E31$5E31Z [/INST] pattern:
\d{4}\$5B\d{2}\$5B\d{2}T\d{2}\$5E\d{2}\$5E\d{2}Z </s>