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

Find a regex pattern that matches the following string:
2008-10-18 15%7E53%7E31.100 [/INST] pattern:
\d{4}\-\d{2}\-\d{2}\ \d{2}%7E\d{2}%7E\d{2}\.\d{3} </s>