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

Find a regex pattern that matches the following string:
2009-01-29 15$7D41$7D37.831 [/INST] pattern:
\d{4}\-\d{2}\-\d{2}\ \d{2}\$7D\d{2}\$7D\d{2}\.\d{3} </s>