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

Find a regex pattern that matches the following string:
2029%2309%2315+14:14:08.286Z [/INST] pattern:
\d{4}%23\d{2}%23\d{2}\+\d{2}:\d{2}:\d{2}\.\d{3}Z </s>