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

Find a regex pattern that matches the following string:
2021%3B01%3B15T13%2D24%2D36.454Z [/INST] pattern:
\d{4}%3B\d{2}%3B\d{2}T\d{2}%2D\d{2}%2D\d{2}\.\d{3}Z </s>