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

Find a regex pattern that matches the following string:
1990$7E06$7E29+22:28:07.539Z [/INST] pattern:
\d{4}\$7E\d{2}\$7E\d{2}\+\d{2}:\d{2}:\d{2}\.\d{3}Z </s>