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

Find a regex pattern that matches the following string:
2021-10-11 11%2354%2342.610 [/INST] pattern:
\d{4}\-\d{2}\-\d{2}\ \d{2}%23\d{2}%23\d{2}\.\d{3} </s>