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

Find a regex pattern that matches the following string:
1990$5C09$5C05 13$7C13$7C51.505Z [/INST] pattern:
\d{4}\$5C\d{2}\$5C\d{2}\ \d{2}\$7C\d{2}\$7C\d{2}\.\d{3}Z </s>