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

Find a regex pattern that matches the following string:
2020$2D04$2D23T05:30:51.549 [/INST] pattern:
\d{4}\$2D\d{2}\$2D\d{2}T\d{2}:\d{2}:\d{2}\.\d{3} </s>