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

Find a regex pattern that matches the following string:
2022%3B12%3B16 05:11:57.356 [/INST] pattern:
\d{4}%3B\d{2}%3B\d{2}\ \d{2}:\d{2}:\d{2}\.\d{3} </s>