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

Find a regex pattern that matches the following string:
2015-09-28T10$5D09$5D50.239Z [/INST] pattern:
\d{4}\-\d{2}\-\d{2}T\d{2}\$5D\d{2}\$5D\d{2}\.\d{3}Z </s>