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

Find a regex pattern that matches the following string:
1994%5C01%5C09T04%3A38%3A08.458Z [/INST] pattern:
\d{4}%5C\d{2}%5C\d{2}T\d{2}%3A\d{2}%3A\d{2}\.\d{3}Z </s>