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

Find a regex pattern that matches the following string:
2000$3E01$3E23 05%4012%4021Z [/INST] pattern:
\d{4}\$3E\d{2}\$3E\d{2}\ \d{2}%40\d{2}%40\d{2}Z </s>