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

Find a regex pattern that matches the following string:
2009%7B12%7B28T15%2335%2310.956 [/INST] pattern:
\d{4}%7B\d{2}%7B\d{2}T\d{2}%23\d{2}%23\d{2}\.\d{3} </s>