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

Find a regex pattern that matches the following string:
1996$2310$2327T18:54:12.301 [/INST] pattern:
\d{4}\$23\d{2}\$23\d{2}T\d{2}:\d{2}:\d{2}\.\d{3} </s>