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

Find a regex pattern that matches the following string:
2001%5C06%5C19T02:30:46.332 [/INST] pattern:
\d{4}%5C\d{2}%5C\d{2}T\d{2}:\d{2}:\d{2}\.\d{3} </s>