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

Find a regex pattern that matches the following string:
2013%3C06%3C28 00:14:23 [/INST] pattern:
\d{4}%3C\d{2}%3C\d{2}\ \d{2}:\d{2}:\d{2} </s>