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

Find a regex pattern that matches the following string:
1998$5D03$5D08T15:48:44.355 [/INST] pattern:
\d{4}\$5D\d{2}\$5D\d{2}T\d{2}:\d{2}:\d{2}\.\d{3} </s>