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

Find a regex pattern that matches the following string:
2018%7E03%7E19T03:42:53.977Z [/INST] pattern:
\d{4}%7E\d{2}%7E\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z </s>