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

Find a regex pattern that matches the following string:
1992%7C01%7C20T16:31:52.254 [/INST] pattern:
\d{4}%7C\d{2}%7C\d{2}T\d{2}:\d{2}:\d{2}\.\d{3} </s>